Two new pentacyclic triterpene acids, 1a, 3b-dihydroxyl-olean-12-en-28-oic acid and 1a, 2a, 3b-trihydroxyl-olean-12-en-28-oic acid, were isolated from the arial parts of Sabia parviflora.
Dasycarine, a new quinoline alkaloid along with five known compounds, dictamine, dihydroobacunone, obacunone, fraxinellone and beta-sitosterol, were isolated from Dictamnus dasycarpus. The structure of dasycarine was ...Dasycarine, a new quinoline alkaloid along with five known compounds, dictamine, dihydroobacunone, obacunone, fraxinellone and beta-sitosterol, were isolated from Dictamnus dasycarpus. The structure of dasycarine was identified as 4, 5, 8- trimethoxyl -3- (3- methyl -2-butenyl)- 2- quinone by 1D and 2D NMR techniques.展开更多
A new benzylisoquinoline alkaloid, 1, 2, 3, 4-tetrahydro-5-hydroxyl-8-methoxyl-2- methyl-4'-methoxyl-benzylisoquinoline, was isolated from the arial parts of Sabia parviflora. Its structure was established on the...A new benzylisoquinoline alkaloid, 1, 2, 3, 4-tetrahydro-5-hydroxyl-8-methoxyl-2- methyl-4'-methoxyl-benzylisoquinoline, was isolated from the arial parts of Sabia parviflora. Its structure was established on the basis of spectral analysis.展开更多
1,2-methylenedioxy-9-methoxy-N-methoxycarbonyl-aporphine and 1,2-methylenedioxy -8,9-dimethoxy-N-methoxycarbonyl-aporphine, two new alkaloids possessing a N-(methoxy carbonyl) group have been isolated from the stems o...1,2-methylenedioxy-9-methoxy-N-methoxycarbonyl-aporphine and 1,2-methylenedioxy -8,9-dimethoxy-N-methoxycarbonyl-aporphine, two new alkaloids possessing a N-(methoxy carbonyl) group have been isolated from the stems of Fssistigma bracteolatum. Their structures were established on the basis of spectral analysis.展开更多
Cleroindicin B, C and E, three new natural products originally isolated from Clerodendrum indicum, have been synthesized (in racemic forms for Cleroindicin C and E) by a facile route, starting from 2-(p-methoxy-phenyl...Cleroindicin B, C and E, three new natural products originally isolated from Clerodendrum indicum, have been synthesized (in racemic forms for Cleroindicin C and E) by a facile route, starting from 2-(p-methoxy-phenyl) ethanol 1. The (() cleroindicin C (5) has been resovled by the enantioselective inclusion methodology.展开更多
文摘Two new pentacyclic triterpene acids, 1a, 3b-dihydroxyl-olean-12-en-28-oic acid and 1a, 2a, 3b-trihydroxyl-olean-12-en-28-oic acid, were isolated from the arial parts of Sabia parviflora.
文摘Dasycarine, a new quinoline alkaloid along with five known compounds, dictamine, dihydroobacunone, obacunone, fraxinellone and beta-sitosterol, were isolated from Dictamnus dasycarpus. The structure of dasycarine was identified as 4, 5, 8- trimethoxyl -3- (3- methyl -2-butenyl)- 2- quinone by 1D and 2D NMR techniques.
基金We are greatly indebted to Professor X. H. Hu for his help in identification of the plant material and to Professors B. R. Bai and P. Su for measuring NMR spectra.
文摘A new benzylisoquinoline alkaloid, 1, 2, 3, 4-tetrahydro-5-hydroxyl-8-methoxyl-2- methyl-4'-methoxyl-benzylisoquinoline, was isolated from the arial parts of Sabia parviflora. Its structure was established on the basis of spectral analysis.
文摘1,2-methylenedioxy-9-methoxy-N-methoxycarbonyl-aporphine and 1,2-methylenedioxy -8,9-dimethoxy-N-methoxycarbonyl-aporphine, two new alkaloids possessing a N-(methoxy carbonyl) group have been isolated from the stems of Fssistigma bracteolatum. Their structures were established on the basis of spectral analysis.
文摘Cleroindicin B, C and E, three new natural products originally isolated from Clerodendrum indicum, have been synthesized (in racemic forms for Cleroindicin C and E) by a facile route, starting from 2-(p-methoxy-phenyl) ethanol 1. The (() cleroindicin C (5) has been resovled by the enantioselective inclusion methodology.
