Studies on the consituents of Osmanthus species. VI. Structures of phenylpropanoid glycosides from the leaves of Osmanthus asiaticus nakai.

Abstract

Three new phenylpropanoid glycosides, named osmanthuside B6 (I), osmanthuside D (II) and osmanthuside E (III), were isolated from the leaves of Osmanthus asiaticus NAKAI (Oleaceae). The structures of I, II and III were determined to be β-(p-hydroxyphenyl) ethyl O-α-L-rhamnopyranosyl-(1→3)-6-O-trans-p-coumaroyl-β-D-glucopyranoside, β-(p-hydroxyphenyl) ethyl O-α-L-rhamnopyranosyl-(1→3)-4-O-cis-p-coumaroyl-β-D-glucopyranoside and β-(p-hydroxyphenyl) ethyl 6-O-trans-feruloyl-β-D-glucopyranoside, respectively, on the basis of chemical and spectral data.