There are 228 lines that fit the selection criteria; the display limit is 500.

Table 4: Recommended rest frequencies for observed interstellar molecular lines by Frank J. Lovas.

	Frequency (MHz)	Unc.	Formula	Name	Quantum numbers	Tr(K) /Ta(K)	Source	Telescope	Astr. ref.	Lab. ref.
	40039.018*	(10)	CH2CO	Ethanone (ketene)	2(1,2)-1(1,1)	0.09	TMC-1	NRO 45m	Ohi98
	40198.356	(30)	C6H	1,3,5-Hexatriynyl	23/2 J=29/2-27/2 e	0.084	TMC-1	NRO 45m	Suz86	Suz86
	40204.150	(30)	C6H	1,3,5-Hexatriynyl	23/2 J=29/2-27/2 f	0.87	TMC-1	NRO 45m	Suz86	Suz86
	40229.643		CH2CN	Cyanomethyl	2-1 5/2-3/2 7/2-5/2 7/2-7/2	0.02	TMC-1	NRO 45m	Ohi98	Ohi98
	40232.796		CH2CN	Cyanomethyl	2-1 3/2-1/2 3/2-1/2 5/2-3/2	0.038	TMC-1	NRO 45m	Irv88a	Irv88a
	40239.188		CH2CN	Cyanomethyl	2-1 5/2-3/2 7/2-5/2 5/2-3/2	0.112	TMC-1	NRO 45m	Irv88a	Irv88a
	40239.684		CH2CN	Cyanomethyl	2-1 5/2-3/2 7/2 5/2 7/2-5/2	0.141	TMC-1	NRO 45m	Irv88a	Irv88a
	40239.993		CH2CN	Cyanomethyl	2-1 5/2-3/2 7/2 5/2 9/2-7/2	0.241	TMC-1	NRO 45m	Irv88a	Irv88a
	40240.520		CH2CN	Cyanomethyl	2-1 5/2-3/2 5/2-5/2 7/2-7/2	0.062	TMC-1	NRO 45m	Irv88a	Irv88a
	40241.356		CH2CN	Cyanomethyl	2-1 5/2-3/2 5/2-3/2 3/2-1/2	0.04	TMC-1	NRO 45m	Ohi98	Ohi98
	40241.360		CH2CN	Cyanomethyl	2-1 5/2-3/2 3/2-3/2 3/2-5/2	b	TMC-1	NRO 45m	Irv88a	Irv88a
	40241.360		CH2CN	Cyanomethyl	2-1 5/2-3/2 5/2-3/2 3/2-1/2	0.034	TMC-1	NRO 45m	Irv88a	Irv88a
	40242.208		CH2CN	Cyanomethyl	2-1 5/2-3/2 5/2-3/2 5/2-3/2	0.066	TMC-1	NRO 45m	Irv88a	Irv88a
	40243.207		CH2CN	Cyanomethyl	2-1 5/2-3/2 3/2-3/2 5/2-3/2	0.103	TMC-1	NRO 45m	Irv88a	Irv88a
	40243.207		CH2CN	Cyanomethyl	2-1 5/2-3/2 5/2-5/2 3/2-5/2	b	TMC-1	NRO 45m	Irv88a	Irv88a
	40244.330		CH2CN	Cyanomethyl	2-1 5/2-3/2 5/2-3/2 7/2-5/2	0.098	TMC-1	NRO 45m	Irv88a	Irv88a
	40247.556		CH2CN	Cyanomethyl	2-1 3/2-1/2 5/2-3/2 5/2-3/2	b	TMC-1	NRO 45m	Irv88a	Irv88a
	40247.556		CH2CN	Cyanomethyl	2-1 3/2-3/2 5/2-3/2 7/2-5/2	0.206b	TMC-1	NRO 45m	Irv88a	Irv88a
	40247.849		CH2CN	Cyanomethyl	2-1 5/2-3/2 3/2-1/2 3/2-1/2	0.04	TMC-1	NRO 45m	Ohi98	Ohi98
	40248.212		CH2CN	Cyanomethyl	2-1 5/2-3/2 5/2-5/2 3/2-3/2	0.02	TMC-1	NRO 45m	Ohi98	Ohi98
	40248.588		CH2CN	Cyanomethyl	2-1 3/2-1/2 5/2-3/2 3/2-1/2	0.05	TMC-1	NRO 45m	Ohi98	Ohi98
	40249.341		CH2CN	Cyanomethyl	2-1 3/2-1/2 1/2-1/2 3/2-3/2	0.03	TMC-1	NRO 45m	Ohi98	Ohi98
	40250.438		CH2CN	Cyanomethyl	2-1 3/2-1/2 3/2-1/2 1/2-1/2	0.02	TMC-1	NRO 45m	Ohi98	Ohi98
	40251.887		CH2CN	Cyanomethyl	2-1 3/2-1/2 5/2-3/2 5/2-5/2	0.03	TMC-1	NRO 45m	Ohi98	Ohi98
	40253.903		CH2CN	Cyanomethyl	2-1 3/2-1/2 5/2-3/2 3/2-3/2	0.02	TMC-1	NRO 45m	Ohi98	Ohi98
	40256.270		CH2CN	Cyanomethyl	2-1 3/2-1/2 3/2-3/2 3/2-3/2	0.03	TMC-1	NRO 45m	Ohi98	Ohi98
	40256.813		CH2CN	Cyanomethyl	2-1 3/2-3/2 3/2-3/2 5/2-5/2	0.05	TMC-1	NRO 45m	Ohi98	Ohi98
	40258.143		CH2CN	Cyanomethyl	2-1 5/2-1/2 3/2-3/2 1/2-1/2	0.02	TMC-1	NRO 45m	Ohi98	Ohi98
	40260.256		CH2CN	Cyanomethyl	2-1 3/2-1/2 1/2-1/2 1/2-3/2	0.02	TMC-1	NRO 45m	Ohi98	Ohi98
	40417.945*	(11)	CH2CO	Ethanone (ketene)	2(0,2)-1(0,1)	0.08	TMC-1	NRO 45m	Ohi98
	40465.013*	( 2)	CCCS	3-Thioxo-1,2-propadienylidene	7-6	0.88	TMC-1	NRO 45m	Kai87
	40471.40 *	(59)	C6H	1,3,5-Hexatriynyl	21/2 J=29/2-27/2 e	0.020	IRC+10216	NRO 45m	Kaw95	JPL01
	40479.254*	(10)	C8H	1,3,5,7-Octatetraynyl	23/2 34.5-33.5 e	0.15fb	IRC+10216	IRAM 30m	Cer96	McC97
	40479.895*	(10)	C8H	1,3,5,7-Octatetraynyl	23/2 34.5-33.5 f	b	IRC+10216	IRAM 30m	Cer96	McC97
	40501.74 *	(60)	C6H	1,3,5-Hexatriynyl	21/2 J=29/2-27/2 f	0.025	IRC+10216	NRO 45m	Kaw95	JPL01
	40576.729*	( 5)	C5H	2,4-Pentadiynylidyne	21/2 J=17/2-15/2 F=9-8 f	0.04	TMC-1	NRO 45m	Ohi98	Ohi98
	40576.931*	( 5)	C5H	2,4-Pentadiynylidyne	21/2 J=17/2-15/2 F=8-7 f	0.05	TMC-1	NRO 45m	Ohi98	Ohi98
	40580.866*	( 5)	C5H	2,4-Pentadiynylidyne	21/2 J=17/2-15/2 F=9-8 e	0.07	TMC-1	NRO 45m	Ohi98	Ohi98
	40581.077*	( 5)	C5H	2,4-Pentadiynylidyne	21/2 J=17/2-15/2 F=8-7 e	0.08	TMC-1	NRO 45m	Ohi98	Ohi98
	40607.333*	( 8)	HC7N	2,4,6-Heptatriynenitrile	36-35	0.093	IRC+10216	NRO 45m	Kaw95
	40671.388*	(20)	HC9N	2,4,6,8-Nonatetraynenitrile	70-69	0.020	IRC+10216	NRO 45m	Kaw95
	40673.413*	(14)	DC5N	2,4-Pentadiynenitrile(cyanobutadiyne)	16-15	0.05	TMC-1	NRO 45m	Ohi98
	40714.164*	(40)	CH3C4H	1,3-Pentadiyne (methyl diacetylene)	10(1)-9(1)	0.10	TMC-1	NRO 45m	Ohi98
	40714.561*	(41)	CH3C4H	1,3-Pentadiyne (methyl diacetylene)	10(0)-9(0)	0.12	TMC-1	NRO 45m	Ohi98
	40793.839*	(10)	CH2CO	Ethanone (ketene)	2(1,1)-1(1,0)	0.11	TMC-1	NRO 45m	Ohi98
	40854.363*	(29)	C5H	2,4-Pentadiynylidyne	23/2 J=17/2-15/2 F=8-7	b	IRC+10216	NRO 45m	Kaw95	JPL01
	40854.775*	(27)	C5H	2,4-Pentadiynylidyne	23/2 J=17/2-15/2 F=9-8	0.047b	IRC+10216	NRO 45m	Kaw95	JPL01
	40854.796*	(29)	C5H	2,4-Pentadiynylidyne	23/2 J=17/2-15/2 F=8-7	b	IRC+10216	NRO 45m	Kaw95	JPL01
	40855.210*	(27)	C5H	2,4-Pentadiynylidyne	23/2 J=17/2-15/2 F=9-8	b	IRC+10216	NRO 45m	Kaw95	JPL01
U	40880.0		unidentified	unidentified transition		0.07	Sgr B2(M)	NRAO 11m	Kut80
	41198.320*	(14)	H2CCC	Propadienylidene	2(1,2)-1(1,1)	0.17	TMC-1	NRO 45m	Ohi98
U	41305.4		unidentified	unidentified transition B1377	15-14	0.025	IRC+10216	NRO 45m	Kaw95
	41313.996*	( 6)	CH3CCCN	2-Butynenitrile	10(1)-9(1)	0.08	TMC-1	NRO 45m	Ohi98
	41314.394*	( 6)	CH3CCCN	2-Butynenitrile	10(0)-9(0)	0.09	TMC-1	NRO 45m	Ohi98
	41493.180*	( 8)	H13CCCCCN	2,4-Pentadiynenitrile(cyanobutadiyne)	16-15	0.05	TMC-1	NRO 45m	Ohi98
	41579.445*	(10)	c-C2H4O	Oxirane (ethylene oxide)	4(2,2)-4(1,3)	0.05	Sgr B2(N)	NRO 45m	Dic97
	41584.627*	( 9)	H2CCC	Propadienylidene	2(0,2)-1(0,1)	0.11	TMC-1	NRO 45m	Ohi98
	41652.515*	(10)	C8H	1,3,5,7-Octatetraynyl	23/2 35.5-34.5 e	0.23fb	IRC+10216	IRAM 30m	Cer96	McC97
	41653.194*	(10)	C8H	1,3,5,7-Octatetraynyl	23/2 35.5-34.5 f	b	IRC+10216	IRAM 30m	Cer96	McC97
U	41712.1		unidentified	unidentified transition		0.012	IRC+10216	NRO 45m	Kaw95
	41735.271*	( 8)	HC7N	2,4,6-Heptatriynenitrile	37-36	0.085	IRC+10216	NRO 45m	Kaw95
	41735.271*	( 9)	HC7N	2,4,6-Heptatriynenitrile	37-36	0.12	TMC-1	NRO 45m	Ohi98
	41967.661*	(11)	H2CCC	Propadienylidene	2(1,1)-1(1,0)	0.20	TMC-1	NRO 45m	Ohi98
	42215.539*	( 5)	DC3N	2-Propynenitrile (cyanoacetylene)	5-4 F=4-3	b	TMC-1	FCRAO 14m	Lan80	Laf78
	42215.590*	( 5)	DC3N	2-Propynenitrile (cyanoacetylene)	5-4 F=5-4	0.14b	TMC-1	FCRAO 14m	Lan80	Laf78
	42215.613*	( 5)	DC3N	2-Propynenitrile (cyanoacetylene)	5-4 F=6-5	b	TMC-1	FCRAO 14m	Lan80	Laf78
	42373.365*	(22)	30SiO	Silicon monoxide	1-0 v=0	28. e	VY CMa	CAdY 13.7m	Bar89
	42519.373*	(27)	SiO	Silicon monoxide	1-0 v=3	2.0	VX Sgr	IRT 13.7m	Sca78
	42558.044*	(14)	HCC13CCCN	2,4-Pentadiynenitrile(cyanobutadiyne)	16-15	0.010	IRC+10216	NRO 45m	Kaw95
	42563.241*	(15)	HCCC13CCN	2,4-Pentadiynenitrile(cyanobutadiyne)	16-15	0.015	IRC+10216	NRO 45m	Kaw95
	42563.241*	(15)	HCCC13CCN	2,4-Pentadiynenitrile(cyanobutadiyne)	16-15	0.04	TMC-1	NRO 45m	Ohi98
	42602.153*	( 2)	HC5N	2,4-Pentadiynenitrile(cyanobutadiyne)	16-15	0.40	TMC-1	NEROC 37m	Irv83
	42674.197*	( 7)	HCS+	Thioxomethylium (thioformylium)	1-0	0.085	TMC-1	NEROC 37m	Irv83
	42820.582*	(23)	SiO	Silicon monoxide	1-0 v=2	15.i	VY CMa	NRAO 11m	Buh74
	42863.206*	(10)	HC7N	2,4,6-Heptatriynenitrile	38-37	0.086	IRC+10216	NRO 45m	Kaw95
	42863.206*	(10)	HC7N	2,4,6-Heptatriynenitrile	38-37	0.11	TMC-1	NRO 45m	Ohi98
	42879.922*	(22)	29SiO	Silicon monoxide	1-0 v=0	3.1e	VY CMa	CAdY 13.7m	Bar89
	42944.988*	( 3)	SiC4	Silicon tetracarbide	14-13	0.74f	TMC-1	NRO 45m	Ohi89
	42970.453	(30)	C6H	1,3,5-Hexatriynyl	31/2-29/2 e	0.108	TMC-1	NRO 45m	Suz86	Suz86
	42977.115	(30)	C6H	1,3,5-Hexatriynyl	31/2-29/2 f	0.13	TMC-1	NRO 45m	Suz86	Suz86
	42995.321*	(24)	HC9N	2,4,6,8-Nonatetraynenitrile	74-73	0.01	IRC+10216	NRO 45m	Kaw95
	43122.079*	(21)	SiO	Silicon monoxide	1-0 v=1	29.i	OriMC-1	NRAO 11m	Sny75
	43263.11 *	(29)	C6H	1,3,5-Hexatriynyl	21/2 J=31/2-29/2 e	0.028	IRC+10216	NRO 45m	Kaw95	JPL01
	43289.809	(20)	HCCCNH+	Protonated 2-propynenitrile	4-3	0.048	TMC-1	NRO 45m	Kaw94	Kaw94
	43294.04 *	(29)	C6H	1,3,5-Hexatriynyl	21/2 J=31/2-29/2 f	0.022	IRC+10216	NRO 45m	Kaw95	JPL01
	43423.864*	(22)	SiO	Silicon monoxide	1-0 v=0	0.50	OriMC-1	NEROC 37m	Sny78
	43624.353*	(10)	HCCN	Cyanomethylene	3,2-2,1	0.016	IRC+10216	IRAM 30m	Gué91
	43962.014*	( 8)	HNCO	Isocyanic acid	2(0,2)-1(0,1) F=1-1	0.05	TMC-1	NRO 45m	Ohi98
	43962.998*	( 2)	HNCO	Isocyanic acid	2(0,2)-1(0,1) F=3-2	<1b	Sgr B2(M)	NRAO 11m	Sny72	Win76
	43963.042*	( 2)	HNCO	Isocyanic acid	2(0,2)-1(0,1) F=2-1	b	Sgr B2(M)	NRAO 11m	Sny72	Win76
	43963.659*	( 5)	HNCO	Isocyanic acid	2(0,2)-1(0,1) F=1-0, 2-2	0.07	TMC-1	NRO 45m	Ohi98
	43981.024*	( 5)	CCS	Thioxoethenylidene	3,4-2,3	0.38	TMC-1	NRO 45m	Kai87
	43991.137*	(11)	HC7N	2,4,6-Heptatriynenitrile	39-38	0.064	IRC+10216	NRO 45m	Kaw95
	43991.137*	(11)	HC7N	2,4,6-Heptatriynenitrile	39-38	0.08	TMC-1	NRO 45m	Ohi98
U	44059.1		unidentified	unidentified transition B1377	16-15	0.020	IRC+10216	NRO 45m	Kaw95
	44069.476*	(15)	CH3OH	Methanol (methyl alcohol)	7(0,7)-6(1,6) A+	3.9	Sgr B2(M)	NRO 45m	Mor85	Xu_97
	44084.172*	(13)	H13CCCN	2-Propynenitrile (cyanoacetylene)	5-4	0.066	IRC+10216	NRO 45m	Kaw95
	44084.172*	(13)	H13CCCN	2-Propynenitrile (cyanoacetylene)	5-4	0.17	TMC-1	NRO 45m	Ohi98	Laf78
	44104.781*	( 3)	c-C3H2	Cyclopropenylidene	3(2,1)-3(1,2)	0.025	IRC+10216	NRO 45m	Kaw95
	44167.274*	(10)	HCCC15N	2-Propynenitrile (cyanoacetylene)	5-4	0.08	TMC-1	NRO 45m	Ohi98	Laf78
	44471.139*	( 9)	H2CCCC	Butatrienylidene	5(1,5)-4(1,4)	0.018	IRC+10216	NRO 45m	Kaw95
	44471.139*	( 9)	H2CCCC	Butatrienylidene	5(1,5)-4(1,4)	0.28	TMC-1	NRO 45m	Ohi98
	44497.600*	( 8)	CC34S	Thioxoethenylidene	4,3-3,2	0.13	L1498	NRO 45m	Yam90
U	44507.7		unidentified	unidentified transition	(U48292.3 USB)	0.06	OriMC-1	NRO 45m	Sai89
	44596.992*	( 4)	CH3CH2CN	Propanenitrile (ethyl cyanide)	5(0,5)-4(0,4)	0.31	OriMC-1	NRO 45m	Sai89
	44659.020*	( 9)	H2CCCC	Butatrienylidene	5(0,5)-4(0,4)	0.14	TMC-1	NRO 45m	Ohi98
	44730.271*	( 4)	CH3CH2CN	Propanenitrile (ethyl cyanide)	5(2,4)-4(2,3)	0.23	OriMC-1	NRO 45m	Sai89
	44785.538*	(56)	CH3C4H	1,3-Pentadiyne (methyl diacetylene)	11(1)-10(1)	0.04	TMC-1	NRO 45m	Ohi98
	44785.931*	(57)	CH3C4H	1,3-Pentadiyne (methyl diacetylene)	11(0)-10(0)	0.05	TMC-1	NRO 45m	Ohi98
	44844.592*	(10)	H2CCCC	Butatrienylidene	5(1,4)-4(1,3)	0.020	IRC+10216	NRO 45m	Kaw95
	44844.592*	(10)	H2CCCC	Butatrienylidene	5(1,4)-4(1,3)	0.19	TMC-1	NRO 45m	Ohi98
U	44864.5		unidentified	unidentified transition	(U47935.5 USB)	0.04	OriMC-1	NRO 45m	Sai89
	44878.104*	( 4)	CH3CH2CN	Propanenitrile (ethyl cyanide)	5(2,3)-4(2,2)	0.30	OriMC-1	NRO 45m	Sai89
	44911.75	( 1)	HCOOH	Formic acid	2(0,2)-1(0,1)	0.044	L134N	NRO 45m	Irv90	Bel71
	44955.778*	(12)	CH3OH	Methanol (methyl alcohol)	2(0,2)-3(1,3) E t=1	0.85	OriMC-1	NRO 45m	Sai89	Xu_97
U	45033.5		unidentified	unidentified transition	(U47976.5 USB)	0.10	OriMC-1	NRO 45m	Sai89
	45103.868*	( 6)	c-H13CCCH	Cyclopropenylidene	2(1,1)-2(0,2)	0.09	TMC-1	NRO 45m	Ohi98
	45119.064*	(12)	HC7N	2,4,6-Heptatriynenitrile	40-39	0.105	CRL 2688	NRO 45m	Fuk94
	45259.076*	( 5)	NaCN	Sodium cyanide	3(1,3)-2(1,2)	0.020	IRC+10216	NRO 45m	Kaw95
	45264.720*	( 2)	HC5N	2,4-Pentadiynenitrile(cyanobutadiyne)	17-16	0.83	TMC-1	NRAO 11m	Buj81
	45297.346*	(14)	HC13CCN	2-Propynenitrile (cyanoacetylene)	5-4	0.22	TMC-1	NRO 45m	Tak98
	45301.707*	( 7)	HCC13CN	2-Propynenitrile (cyanoacetylene)	5-4	0.34	TMC-1	NRO 45m	Tak98
	45350.68 *	( 3)	C5H	2,4-Pentadiynylidyne	21/2 J=19/2-17/2 e F=10-9	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45350.73 *	( 3)	C5H	2,4-Pentadiynylidyne	21/2 J=19/2-17/2 e F=9-8	0.047b	IRC+10216	NRO 45m	Kaw95	JPL01
	45354.92 *	( 3)	C5H	2,4-Pentadiynylidyne	21/2 J=19/2-17/2 f F=10-9	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45354.97 *	( 3)	C5H	2,4-Pentadiynylidyne	21/2 J=19/2-17/2 f F=9-8	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45379.029*	( 2)	CCS	Thioxoethenylidene	4,3-3,2	2.23	TMC-1	NRO 45m	Suz84
	45488.839*	( 1)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 F=5-5	0.37	TMC-1	NRO 45m	Ohi98	Laf78
	45490.264*	( 1)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 F=4-3	b	Sgr B2(M)	NRAO 11m	Mor76	Laf78
	45490.316*	( 1)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 F=5-4	2.05j	Sgr B2(M)	NRAO 11m	Mor76	Laf78
	45490.340*	( 1)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 F=6-5	b	Sgr B2(M)	NRAO 11m	Mor76	Laf78
	45492.110*	( 1)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 F=4-4	0.37	TMC-1	NRO 45m	Ohi98	Laf78
	45564.872*	(24)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 6=1 =1e	1.1f	G10.47+0.03	MPI 100m	Wyr99	Laf78
	45600.738*	(25)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 6=1 =1f	b	G10.47+0.03	MPI 100m	Wyr99	Laf78
	45602.145*	(25)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 7=1 =1e	7.1bf	G10.47+0.03	MPI 100m	Wyr99	Laf78
	45660.66 *	( 1)	C5H	2,4-Pentadiynylidyne	23/2 J=19/2-17/2 e F=9-8	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45660.98 *	( 1)	C5H	2,4-Pentadiynylidyne	23/2 J=19/2-17/2 e F=10-9	0.057b	IRC+10216	NRO 45m	Kaw95	JPL01
	45661.21 *	( 1)	C5H	2,4-Pentadiynylidyne	23/2 J=19/2-17/2 f F=9-8	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45661.52 *	( 1)	C5H	2,4-Pentadiynylidyne	23/2 J=19/2-17/2 f F=10-9	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45667.519*	(16)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 7=1 =1f	5.7f	G10.47+0.03	MPI 100m	Wyr99	Laf78
	45727.13 *	( 5)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 6=1 7=1 =0+	b	G10.47+0.03	MPI 100m	Wyr99	Wyr99
	45727.49 *	(10)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 6=1 7=1 =0-	b	G10.47+0.03	MPI 100m	Wyr99	Wyr99
	45729.40 *	( 5)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 6=1 7=1 =2-	b	G10.47+0.03	MPI 100m	Wyr99	Wyr99
	45729.48 *	(10)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 6=1 7=1 =2+	4.7bf	G10.47+0.03	MPI 100m	Wyr99	Wyr99
	45742.443*	(58)	C6H	1,3,5-Hexatriynyl	23/2 J=33/2-31/2 f F=17-16	0.056b	IRC+10216	NRO 45m	Kaw95	JPL01
	45742.521*	(40)	C6H	1,3,5-Hexatriynyl	23/2 J=33/2-31/2 f F=16-15	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45750.040*	(40)	C6H	1,3,5-Hexatriynyl	23/2 J=33/2-31/2 e F=17-16	0.056b	IRC+10216	NRO 45m	Kaw95	JPL01
	45750.061*	(40)	C6H	1,3,5-Hexatriynyl	23/2 J=33/2-31/2 e F=16-15	b	IRC+10216	NRO 45m	Kaw95	JPL01
	45778.864*	(28)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 7=2 =2e	b	G10.47+0.03	MPI 100m	Wyr99	Laf78
	45779.105*	(26)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 7=2 =0	4.5bf	G10.47+0.03	MPI 100m	Wyr99	Laf78
	45779.167*	(28)	HCCCN	2-Propynenitrile (cyanoacetylene)	5-4 7=2 =2f	b	G10.47+0.03	MPI 100m	Wyr99	Laf78
	45826.733*	( 4)	CCO	Oxoethenylidene	3,2-2,1	0.050	TMC-1	NRO 45m	Ohi91
	46012.386*	( 3)	SiC4	Silicon tetracarbide	15-14	b	TMC-1	NRO 45m	Ohi89
	46054.76 *	(28)	C6H	1,3,5-Hexatriynyl	21/2 J=33/2-31/2 e	0.029	IRC+10216	NRO 45m	Kaw95	JPL01
	46086.32 *	(29)	C6H	1,3,5-Hexatriynyl	21/2 J=33/2-31/2 f	0.033	IRC+10216	NRO 45m	Kaw95	JPL01
	46245.621*	( 5)	CCCS	3-Thioxo-1,2-propadienylidene	8-7	0.84	TMC-1	NRO 45m	Kai87
	46246.988*	(13)	HC7N	2,4,6-Heptatriynenitrile	41-40	0.05	TMC-1	NRO 45m	Ohi98
	46247.580*	(10)	13CS	Carbon monosulfide	1-0	0.148	Sgr B2(M)	NRAO 11m	Tur73
	46266.934*	( 1)	CH2CHCN	2-Propenenitrile (vinyl cyanide)	5(1,5)-4(1,4)	0.10	TMC-1	NRO 45m	Ohi98
	46683.086	(20)	HNCCC	3-Imino-1,2-propadienylidene	5-4	0.30	TMC-1	NRO 45m	Kaw92a	Kaw92a
	46755.614*	( 3)	c-C3H2	Cyclopropenylidene	2(1,1)-2(0,2)	1.00	TMC-1	NRO 45m	Suz85
U	46812.8		unidentified	unidentified transition B1377	17-16	0.025	IRC+10216	NRO 45m	Kaw95
	46847.734*	( 3)	NaCN	Sodium cyanide	3(0,3)-2(0,2)	0.020	IRC+10216	NRO 45m	Kaw95
	47064.813*	(16)	SiC2	Silicon carbide (silacyclopropyne)	2(0,2)-1(0,1)	0.233	IRC+10216	NRO 45m	Kaw95
	47094.974*	(10)	c-C2H4O	Oxirane (ethylene oxide)	4(4,1)-4(3,2)	0.05	Sgr B2(N)	NRO 45m	Dic97
	47354.648*	( 1)	CH2CHCN	2-Propenenitrile (vinyl cyanide)	5(0,5)-4(0,4)	0.18	TMC-1	NRO 45m	Ohi98
	47374.907*	(14)	HC7N	2,4,6-Heptatriynenitrile	42-41	0.078	IRC+10216	NRO 45m	Kaw95
U	47408.5		unidentified	unidentified transition		0.026	IRC+10216	NRO 45m	Kaw95
U	47423.6		unidentified	unidentified transition		0.029	IRC+10216	NRO 45m	Kaw95
	47436.151*	(32)	HC13CCCCN	2,4-Pentadiynenitrile(cyanobutadiyne)	18-17	0.022	IRC+10216	NRO 45m	Kaw95
	47534.069*	(16)	CH3OCHO	Methyl formate	4(0,4)-3(0,3) E	0.25	OriMC-1	NRO 45m	Sai89	Oes99
	47536.941*	(16)	CH3OCHO	Methyl formate	4(0,4)-3(0,3) A	0.23	OriMC-1	NRO 45m	Sai89	Oes99
	47556.928*	(16)	c-C2H4O	Oxirane (ethylene oxide)	5(5,0)-5(4,1)	0.12	Sgr B2(N)	NRO 45m	Dic97
	47566.80 *	( 2)	C4H	1,3-Butadiynyl	11/2-9/2	0.10	Sgr B2(M)	NRO 45m	Sai89
	47595.991*	( 3)	C4H	1,3-Butadiynyl	J=9/2-9/2 F=4-4	0.06	TMC-1	NRO 45m	Ohi98	JPL01
	47605.49 *	( 2)	C4H	1,3-Butadiynyl	9/2-7/2	0.09	Sgr B2(M)	NRO 45m	Sai89
	47643.113*	(34)	HC9N	2,4,6,8-Nonatetraynenitrile	82-81	0.02	IRC+10216	NRO 45m	Kaw95
	47660.624*	( 2)	SO2	Sulfur dioxide	31(5,27)-30(6,24)	0.08	OriMC-1	NRO 45m	Sai89
	47674.961*	( 2)	CH3OCH3	Dimethyl ether	1(1,1)-0(0,0) EE	0.09	OriMC-1	NRO 45m	Sai89	Gro98
	47726.482*	(10)	24MgNC	Magnesium isocyanide	7/2,4-5/2,3	0.030	IRC+10216	NRO 45m	Kaw95
	47741.702*	(10)	24MgNC	Magnesium isocyanide	9/2,4-7/2,3	0.039	IRC+10216	NRO 45m	Kaw95
	47746.980*	( 5)	CH3CHO	Acetaldehyde (ethanal)	1(1,0) - 1(0,1) E	0.06	Sgr B2(M)	NRO 45m	Sai89	Kle96
	47752.82 *	( 1)	DCOOH	Formic acid	1(1,0)-1(0,1)	0.13	OriMC-1	NRO 45m	Sai89	Wil80
	47820.620*	( 4)	CH3CHO	Acetaldehyde (ethanal)	1(1,0) - 1(0,1) A++	0.06	Sgr B2(M)	NRO 45m	Sai89	Kle96
	47913.426*	( 2)	SO2	Sulfur dioxide	14(2,12)-13(3,11)	1.15	OriMC-1	NRO 45m	Sai89
	47927.275*	( 2)	HC5N	2,4-Pentadiynenitrile(cyanobutadiyne)	18-17	1.50	TMC-1	NRO 45m	Suz84a
U	47935.5		unidentified	unidentified transition	(U44864.5 LSB)	0.04	OriMC-1	NRO 45m	Sai89
U	47976.5		unidentified	unidentified transition	(U45033.5 LSB)	0.10	OriMC-1	NRO 45m	Sai89
	48108.475*	( 5)	CCCO	3-Oxo-1,2-propadienylidene	5-4	0.158	TMC-1	NRO 45m	Suz84a
	48120.435*	( 3)	SO2	Sulfur dioxide	21(2,20)-20(3,17)	0.39	OriMC-1	NRO 45m	Sai89
	48178.333*	( 6)	CH3OH	Methanol (methyl alcohol)	1(0,1)-0(0,0) E t=2	0.03	OriMC-1	NRO 45m	Sai89	And90
	48192.12	(10)	CH3OH	Methanol (methyl alcohol)	1(0,1)-0(0,0) A+ t=2	0.06	OriMC-1	NRO 45m	Sai89	Ven55
	48206.946*	( 4)	C34S	Carbon monosulfide	1-0	0.380	DR21(OH)	NRAO 11m	Tur73
	48247.572*	( 2)	CH3OH	Methanol (methyl alcohol)	1(0,1)-0(0,0) E t=1	0.23	OriMC-1	NRO 45m	Sai89	Xu_97
	48257.302*	( 4)	CH3OH	Methanol (methyl alcohol)	1(0,1)-0(0,0) A+ t=1	0.09	OriMC-1	NRO 45m	Sai89	Xu_97
	48284.520*	( 3)	H2CO	Formaldehyde (methanal)	4(1,3)-4(1,4)	0.63	OriMC-1	NRAO 11m	Hol77
U	48292.3		unidentified	unidentified transition	(U44507.7 LSB)	0.06	OriMC-1	NRO 45m	Sai89
	48372.4670	( 2)	CH3OH	Methanol (methyl alcohol)	1(0,1)-0(0,0) A+	0.44	OriMC-1	NRAO 11m	Hol77	Heu73
	48376.889*	( 1)	CH3OH	Methanol (methyl alcohol)	1(0,1)-0(0,0) E	0.29	OriMC-1	NRAO 11m	Hol77	Xu_97
	48502.823*	(15)	HC7N	2,4,6-Heptatriynenitrile	43-42	0.105	IRC+10216	NRO 45m	Kaw95
	48514.59 *	( 2)	C6H	1,3,5-Hexatriynyl	23/2 J=35/2-33/2 f	0.064	IRC+10216	NRO 45m	Kaw95	JPL01
	48523.04 *	( 2)	C6H	1,3,5-Hexatriynyl	23/2 J=35/2-33/2 e	0.066	IRC+10216	NRO 45m	Kaw95	JPL01
	48548.217*	( 5)	NaCN	Sodium cyanide	3(1,2)-2(1,1)	0.025	IRC+10216	NRO 45m	Kaw95
	48552.562*	( 1)	CH2CHCN	2-Propenenitrile (vinyl cyanide)	5(1,4)-4(1,3)	0.07	TMC-1	NRO 45m	Ohi98
	48583.290	(30)	C33S	Carbon monosulfide	1-0 F=1/2-3/2	b	Sgr B2(M)	NRAO 11m	Tur73	Bog81
	48585.918	(30)	C33S	Carbon monosulfide	1-0 F=5/2-3/2	<0.12b	Sgr B2(M)	NRAO 11m	Tur73	Bog81
	48589.074	(30)	C33S	Carbon monosulfide	1-0 F=3/2-3/2	b	Sgr B2(M)	NRAO 11m	Tur73	Bog81
U	48593.4		unidentified	unidentified transition		0.027	IRC+10216	NRO 45m	Kaw95
U	48602.2		unidentified	unidentified transition		0.023	IRC+10216	NRO 45m	Kaw95
	48651.6043	(10)	OCS	Carbon oxide sulfide	4-3	0.45	Sgr B2(M)	NRAO 11m	Hol77	Dub80
	48846.36 *	(27)	C6H	1,3,5-Hexatriynyl	21/2 J=35/2-33/2 e	0.064	IRC+10216	NRO 45m	Kaw95	JPL01
	48878.59 *	(28)	C6H	1,3,5-Hexatriynyl	21/2 J=35/2-33/2 f	0.066	IRC+10216	NRO 45m	Kaw95	JPL01
	48990.957*	( 2)	CS	Carbon monosulfide	1-0	3.53	OriMC-1	NRAO 11m	Tur73
	49079.763*	( 3)	SiC4	Silicon tetracarbide	16-15	0.37f	TMC-1	NRO 45m	Ohi89
U	49148.1		unidentified	unidentified transition		0.013	IRC+10216	NRO 45m	Kaw95
	49272.919*	(22)	H13CCCCCN	2,4-Pentadiynenitrile(cyanobutadiyne)	19-18	0.030	IRC+10216	NRO 45m	Kaw95
	49466.413*	(12)	CCCN	Cyanoethynyl	5-4 J=11/2-9/2 F=11/2-9/2	b	TMC-1	NRO 45m	Ohi98	Got83
	49466.413*	(12)	CCCN	Cyanoethynyl	5-4 J=11/2-9/2 F=9/2-7/2	b	TMC-1	NRO 45m	Ohi98	Got83
	49466.461*	(12)	CCCN	Cyanoethynyl	5-4 J=11/2-9/2 F=13/2-11/2	0.19b	TMC-1	NRO 45m	Ohi98	Got83
	49485.197*	(12)	CCCN	Cyanoethynyl	5-4 J=9/2-7/2 F=7/2-5/2	b	TMC-1	NRO 45m	Ohi98	Got83
	49485.247*	(12)	CCCN	Cyanoethynyl	5-4 J=9/2-7/2 F=11/2-9/2	0.18b	TMC-1	NRO 45m	Ohi98	Got83
	49485.247*	(12)	CCCN	Cyanoethynyl	5-4 J=9/2-7/2 F=9/2-7/2	b	TMC-1	NRO 45m	Ohi98	Got83
U	49566.1		unidentified	unidentified transition B1377	18-17	0.030	IRC+10216	NRO 45m	Kaw95
	49630.734*	(17)	HC7N	2,4,6-Heptatriynenitrile	44-43	0.082	IRC+10216	NRO 45m	Kaw95
	49678.071*	( 5)	HCCNC	Ethyne, isocyanide	5-4	0.56	TMC-1	NRO 45m	Kaw92
	49865.226*	(12)	C8H	1,3,5,7-Octatetraynyl	23/2 42.5-41.5 e	0.29fb	IRC+10216	IRAM 30m	Cer96	McC97
	49866.198*	(12)	C8H	1,3,5,7-Octatetraynyl	23/2 42.5-41.5 f	b	IRC+10216	IRAM 30m	Cer96	McC97
	51841.418*	( 4)	c-C3H2	Cyclopropenylidene	1(1,1)-0(0,0)	1.5	TMC-1	FCRAO 14m	Mad86a

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