6,9-Epoxy-2H-1,4-dioxacyclodeca[cd]pentalene-2,7(4aH)-dione, 2a,3,5,6,11a,11b-hexahydro-3-hydroxy-2a,6,10-trimethyl-3-(1-methylethenyl)-, [2aS-(2aR*,3S*,4aR*,6S*,10Z,11aS*,11bS*)]- 69883-97-2 Eremantholide C NSC669146