511-89-7 NSC609065 Plumieride Spiro[cyclopenta[c]pyran-7(1H),2'(5'H)-furan]-4-carboxylic acid, 1-(.beta.-D-glucopyranosyloxy)-4a,7a-dihydro-4'-(1-hydroxy ethyl)-5'-oxo-, methyl ester, [1S-[1.alpha.,4a.alpha., 7.alpha.(R*),7a.alpha.]]-