Abstract
Three new flavonoid glycosides, demethoxycentaureidin 7-O-beta-D-galacturonopyranoside, pectolinarigenin 7-O-alpha-L-rhamnopyranosyl-(1'''-> 4 '')-beta-D-glucopyranoside and 7-O-alpha-L-rhamnopyranosyl-(1'''-> 4 '')-beta-D-glucuronopyranoside, a new megastigmane glucoside, byzantionoside B 6'-O-sulfate, and a new (Z)-hex-3-en-1-ol O-beta-D-xylopyranosyl-(1 ''-> 2')-beta-D-glucopyranoside, were isolated from leaves of Ruellia panda J(ACQ)., together with 12 known compounds, beta-sitosterol glucoside, vanilloside, bioside (decaffeoyl verbascoside), acteoside (verbascoside), syringin, benzyl alcohol O-beta-D-xylopyranosyl-(1 ''-> 2')-beta-D-glucopyranoside, cistanoside E, roseoside, phenethyl alcohol O-beta-D-xylopyranosyl-(1 ''-> 2')-beta-D-glucopyranoside, (+)-Iyoniresinol 3 alpha-O-beta-D-glucopyranoside, isoacteoside and 3,4,5-trimethoxyphenol O-alpha-L-rhamnopyranosyl-(1 ''-> 6')-beta-D-glucopyranoside. Their structures were elucidated by means of spectroscopic analyses.