57420-46-9 8-O-Acetyl shanzhiside methyl ester 82146-06-3 Ac-Shanz-ME Cyclopenta(c)pyran-4-carboxylic acid, 7-(acetyloxy)-1-(beta-D-glucopyranosyloxy)-1,4a,5,6,7,7a-hexahydro-5-hydroxy-7-methyl-, methyl ester, (1S-(1alpha,4aalpha,5alpha,7alpha,7aalpha))-