(2S-(2alpha,3E,4beta))-2-(3,4-Dihydroxyphenyl)ethyl 5-carboxy-3-ethylidene-2-(beta-D-glucopyranosyloxy)-3,4-dihydro-2H-pyran-4-acetate 2H-Pyran-4-acetic acid, 5-carboxy-3-ethylidene-2-(beta-D-glucopyranosyloxy)-3,4-dihydro-, 2-(3,4-dihydroxyphenyl)ethyl ester, (2S-(2alpha,3E,4beta))- 52077-55-1