Synonyms: Spiro[17H-cyclopenta[a]phenanthrene-17,5'(2'H)-oxazole],spiro[estrane-17,5'(2'H)-oxazole] deriv.; Spiro[17H-cyclopenta[a]phenanthrene-17,5'(2'H)-oxazole],1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16-hexadecahydro-13-methyl-, [8R-(8a,9b,10a,13a,14b)]-; [8R-(8a,9b,10a,13a,14b)]-1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16-Hexadecahydro-13-methylspiro[17H-cyclopenta[a]phenanthrene-17,5'(2'H)-oxazole]