20493-56-5 4(5H)-Benzofuranone, 6-ethenyl-6,7-dihydro-3,6-dimethyl-5-(1-methylethenyl)-, (5R,6R)-rel- 4(5H)-Benzofuranone, 6-ethenyl-6,7-dihydro-3,6-dimethyl-5-(1-methylethenyl)-, trans- 78964-39-3 Curzerenone