Cyclopenta[c]pyran-4-carboxylic acid,1-(â-D-glucopyranosyloxy)-1,4a,5,6,7,- 7a-hexahydro-4a,7-dihydroxy-6-[[(2E)-3- (4-methoxyphenyl)-1-oxo-2-propenyl]oxy]-7- methyl-,methyl ester,(1S,4aR,6S,7R,