Abstract:

A novel C₃₀ sterol, (22E, 24x)-24-n-propylcholest-7, 22-dien-3b-ol (racemosol, 1), along with scopoletin (2), scopolin (3), umbelliferone (4), methyl b-D-frucopyranoside (5), syringaresinol-4-O-b-D-glucopyranoside (6), quercetin-3-O-b-D-glucopyranoside (7), quercetin-3-O-a-L-rhamnopyranoside(8), eupatilin (9), kaempferol-3-O-b-D-glucopyranoside (10) and (E)-N-2-(2,3-dihydroxyphenyl) ethyl cinnamamide (11), was isolated from the whole plants of Porana racemosa Roxb. Their structures were elucidated predominantly by spectral evidence.

Key words: Porana racemosa , Convolvulaceae, C30 sterol, racemosol, flavonol glycoside