b-D-Glucopyranoside, 5-[[[1-(b-D-glucopyranosyloxy)-1,4a,5,6,7,7a-hexahydro-7-methylcyclopenta[c]pyran-4-yl]carbonyl]oxy]-1,4a,5,6,7,7a-hexahydro-6,7-dihydroxy-7-(hydroxymethyl)cyclopenta[c]pyran-1-yl,[1S-[1a,4aa,5a(1R*,4aR*,7S*,7aS*),6b,7a,7aa]]-