Synonyms: Cyclopenta[7,8]phenanthro[2,1-b][1,4]oxazine,4'H-estr-3-eno[3,4-b][1,4]oxazine deriv.; Cyclopenta[7,8]phenanthro[2,1-b][1,4]oxazine,1,5,6,6a,6b,7,8,8a,9,10,11,11a,11b,12,13,13a-hexadecahydro-8a-methyl-, [6aR-(6aa,6bb,8aa,11ab,11ba)]-; [6aR-(6aa,6bb,8aa,11ab,11ba)]-1,5,6,6a,6b,7,8,8a,9,10,11,11a,11b,12,13,13a-Hexadecahydro-8a-methylcyclopenta[7,8]phenanthro[2,1-b][1,4]oxazine