Isolation and Characterization of New Constituents from Tricholepis eburnea

摘要

Through current phytochemical investigation on dichloromethane (DCM) fraction of 80% methanolic extract of Tricholepis eburnea, seven chemical constituents were isolated and their structures were elucidated by spectroscopic analyses. Two of them were identified as new flavonoids as trichonoide A ( 1 ) and trichonoide B ( 2 ), while the other five known constituents β -sitosterol ( 3 ), 3- O -acetyl- β -stigmastanol ( 4 ), 3 β ,17 β ,20-trihydroxy-l-oxo-(20 R , 22 R)- witha-5,14,24-trienolide ( 5 ), pectolinaringenin ( 6 ), and dillenetin ( 7 ) were isolated for the first time from this species .