a-D-Glucopyranoside,(1S,4R,5R,6R,6aS,9S,10aR)-1,2,4,5,6,6a,7,8,9,10a-decahydro-1,5-dihydroxy-3-[(1S)-2-hydroxy-1-methylethyl]-9-(methoxymethyl)-6,10a-dimethyldicyclopenta[a,d]cycloocten-4-yl6-O-(1,1-dimethyl-2-propenyl)-