(1aalpha,3R*,3abeta,3balpha,4alpha,6aalpha,7beta,7aS*)-Hexahydro-4,7-dihydroxy-3a,5,5-trimethylspiro(cyclopenta(4,5)pentaleno(1,6a-b)oxirene-3(3aH),2'-oxiran)-2-(1aH)-one 33404-85-2 Coriolin Coriolin-A Spiro(3H-cyclopenta(a)pentalene-3,2'-oxiran)-2(1H)-one, 1,7a-epoxyoctahydro-4,7-dihydroxy-3a,5,5-trimethyl-, stereoisomer