Synonyms: 2,7,8-Trioxabicyclo[3.2.1]octane-1-ethanethioicacid, 3-[2-[(7a,13a)-7-(acetyloxy)-16-hydroxy-3-oxo-17-oxaandrosta-1,4-dien-16-yl]-1-methyl-2-oxoethyl]-5,6,6-trimethyl-,S-methyl ester, (1S-exo)-; 17-Oxaandrostane,2,7,8-trioxabicyclo[3.2.1]octane-1-ethanethioic acid deriv.;Phenanthro[2,1-b]furan, 2,7,8-trioxabicyclo[3.2.1]octane-1-ethanethioic acidderiv.; Petuniasterone N