4a,7b-dihydroxy-1,1,3,6,8-pentamethyl-5-oxo-1,1a,1b,4,4a,5,7a,7b,8,9-decahydro-9aH-cyclopropa[3,4]benzo[1,2-e]azulene-9,9a-diyl dihexadecanoate