21178-57-4 2H-3-Benzoxacyclododecin-2,10-(1H)-dione, 4,5,6,7-tetrahydro-11,13-dihydroxy-4-methyl- 4,5,6,7-Tetrahydro-11,13-dihydroxy-4-methyl-2H-3-benzoxacyclododecin-2,10-(1H)-dione alpha,beta-Dehydrocurvularin