62197-65-3

(E)-2-Methyl-2-butenoic acid [(1R)-2,2aα,4,5,6,6aα,7,8,9aβ,9bα-decahydro-1α-hydroxy-1,7β-dimethyl-4,8-dioxo-1H-azuleno[1,8-bc:4,5-b]difuran-6β-yl] ester