Synonyms: Ergostan-1-one,2-(acetyloxy)-6,7-epoxy-22,24,25-[ethylidynetris(oxy)]-5-hydroxy-, [2a,5a,6a,7a,22R(S)]-;2,7,8-Trioxabicyclo[3.2.1]octane, ergostan-1-one deriv.;6,7-Epoxy-1H-cyclopenta[a]phenanthrene, ergostan-1-one deriv.;(+)-Petuniasterone O; Petuniasterone O