IUPAC:(4aR,8aS)-9a-[(4aR,8aS,9aR)-3,8a-dimethyl-5-methylidene-2-oxo-2H,4H,4aH,5H,6H,7H,8H,8aH,9H,9aH-naphtho[2,3-b]furan-9a-yl]-3,8a-dimethyl-5-methylidene-2H,4H,4aH,5H,6H,7H,8H,8aH,9H,9aH-naphtho[2,3-b]furan-2-one
IUPAC:(4aR,8aS)-9a-[(4aR,8aS,9aR)-3,8a-dimethyl-5-methylidene-2-oxo-2H,4H,4aH,5H,6H,7H,8H,8aH,9H,9aH-naphtho[2,3-b]furan-9a-yl]-3,8a-dimethyl-5-methylidene-2H,4H,4aH,5H,6H,7H,8H,8aH,9H,9aH-naphtho[2,3-b]furan-2-one