58030-93-6 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-methylethyl)-, (2aR*,3S*,4aR*,6S*,11aS*,11bS*)-(+)- Eremantholide NSC 380720