(4aR,7bS,8R,9R,9aS)-4a,7b-dihydroxy-3-(hydroxymethyl)-1,1,6,8-tetramethyl-9a-[(2-methylbutanoyl)oxy]-5-oxo-1a,1b,4,4a,5,7a,7b,8,9,9a-decahydro-1H-cyclopropa[3,4]benzo[1,2-e]azulen-9-yl decanoate