[(4R)-1,2,4,5,6,6aβ,7,8,9,10a-Decahydro5α,9β-dihydroxy-9-(methoxymethyl)-6α,10aα-dimethyl-3-isopropyldicyclopenta[a,d]cycloocten-4β-yl]6-O-methyl-α-D-glucopyranoside