Abstract
Investigation of the crude drug ‘Ye su xin’, the dried flowers of Jasminum polyanthum, led to the isolation of two new secoiridoid glucosides, jaspolyoside and jaspolyanthoside, together with the known secoiridoid glucosides, oleuropein, ligstroside and Gl 5. The structures of the new compounds were elucidated as [2S-(2α,3E,4β)]-3-ethylidene-2-[6-O-([2S-(2α,3E,4β)]-{[3-ethylidene-2-(β- d-glucopyranosyloxy)-3,4-dihydro-5-(methoxycarbonyl)-2H-pyran-4-yl]acetyloxy})-β- d-glucopyranosyl]-3,4-dihydro-5-(methoxycarbonyl)-2H-pyran-4-acetic acid 2-(3,4-dihydroxyphenyl) ethyl ester and [2S-(2α,3E,4β)]-3-([2S-(2α,3E,4β)]-{[3-ethylidene-2-(β- d-glucopyranosyloxy)-3,4-dihydro-5-(methoxycarbonyl)-2H-pyran-4-yl]acetyloxy}) ethylidene-2-(β- d-glucopyranosyloxy)-3,4-dihydro-5-(methoxycarbonyl)-2H-pyran-4-acetic acid methyl ester on the basis of chemical and spectroscopic data.
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