3,16-Dibenzoylcevin 4,9-Epoxycevane-3-alpha,4-beta,12,14,16-beta,17,20-heptol 3,16-dibenzoate Cevane-3-alpha,4-beta,12,14,16-beta,17,20-heptol, 4,9-epoxy-, 3,16-dibenzoate FL4917500