Chemical Constituents from Twigs of Trigonostemon lutescens (II)

Abstract:

In order to understand the chemical constituents of Trigonostemon lutescens, eleven compounds were isolated from its 95% EtOH extract by silica gel and sephadex LH-20 column chromatography. On the basis of spectral data, they were identified as ent-kaurane-3β,16β-diol (1), (3R,6R,7E)-3-hydroxy-4,7-megastigmadien-9-one (2), palmarumycin JC2 (3), (±)-3-(3,4,5-trimethoxyphenyl)-1,2-propanediol (4), erythro-guaiacylglycerol-β-O-4'-coniferyl ether (5), threo-guaiacylglycerol-β-O-4'-coniferyl ether (6), 3-hydroxymethyl-5-(3-hydroxypropyl)- 7-methoxy-2-{3-methoxy-4-[1-(3,4-dimethoxybenzyl)-2-hydroxyethyl]phenyl}-2,3-dihydrobenzofuran (7), ancistrocline (8), hamatine (9), scopolin (10), syringin (11). All the compounds were isolated from this plant for the first time, and they were isolated from the genus Trigonostemon for the first time except of compound 12.

Key words:Trigonostemon lutescens;Twigs;Chemical constituent