511-89-7 Plumieride Spiro(cyclopenta(c)pyran-7(1H),2'(5'H)-furan)-4-carboxylic acid, 1-(beta-D-glucopyranosyloxy)-4a,7a-dihydro-4-(1-hydroxyethyl)-5'-oxo-, methyl ester, (1S-(1alpha,4aalpha,7alpha(R*),7aalpha))-