Thermal stability of levopimaric acid and its oxidation products

BMC Chemistry

Table 7 Oxidation products of levopimaric acid

NO.	Products	CAS number	Relative content (%)	Similarity (%)
1	Abietic acid	514-10-3	20.78	98
2	Palustric acid	1945-53-5	2.70	95
3	Neoabietic acid	471-77-2	1.95	84
4	Dehydroabietic acid	1740-19-8	51.09	93
5	1,3-Dimethyl-2-[2-[3-(1-methylethyl)phenyl]ethyl]-methylcyclohexanecarboxylate acid	41298-29-7	1.11	86
6	1-Phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-9-hydroxy-1,4a-dimethyl-7-(1-methylethyl)-, (1R,4aS,9R,10aR)- (9CI, ACI)	76235-98-8	1.27	90
7	7-vinyl-1,2,3,4,4a,4b,5,6,7,9,10,10a-dodecahydro1,4a,7-trimethyl-7,15-pimaridiene- methyl 18-phenanthrene 1-carboxylate	1686-54-0	6.95	92
8	13-Methoxypodocarpa-8,11,13-trien-19-oic acid	38041-43-9	1.14	85
9	Methyl 1-Phenanthrenecarboxylic acid, 1,2,3,4,4a,5,8,9,10,10a-decahydro-1,4a-dimethyl-7-(1-methylethyl)-5,8-dioxo-, (1 S,4aS,10aR)- (9CI, ACI)	96160-44-0	1.55	83
10	1-Phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-6-methoxy-1,4a-dimethyl-7-(1-methylethyl)-, (1R,4aS,10aR)- (ACI)	42400-90-8	2.89	85
11	1-Phenanthrenecarboxylic acid, 1,2,3,4,4a,10a-hexahydro-9-methoxy-1,4a-dimethyl-7-(1-methylethyl)-, methyl ester, (1R,4aS,10aR)- (ACI)	197444-13-6	0.98	83
12	1-Phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-6-methoxy-1,4a-dimethyl-7-(1-methylethyl)-, (1R,4aS,10aR)- (ACI)	42400-90-8	0.39	76
13	7-Oxodehydroabietic acid	110936-78-2	4.12	90
14	18-Norabietatriene	19407-17-1	0.03	93
15	Unknown component		1.02
16	Unknown component		0.77
17	Unknown component		2.89

ISSN: 2661-801X