157653-66-2 24-Norchola-20,22-diene-4-carboxaldehyde,3-(acetyloxy)-14,15:21,23-diepoxy-1,7,19-trihydroxy-4,8-dimethyl-11-oxo-,cyclic 4,19-(2-methyl-1-oxopropyl acetal), [1a,3a,4b(S),5a,7a,13a,14b,15b,17a]- 157660-95-2 Oxireno[5,6]cyclotetradeca[1,2-b]furan-11(2H)-one,1a,3,4,7,9a,12,12a,13,14,14a-decahydro-4-hydroxy-4,8,14a-trimethyl-12-methylene-,[1aS-(1aR*,4S*,5E,8E,9aR*,12aR*,14aR*)]-