Synonyms: 4,12a-Ethano-12aH-phenanthro[4,4b-bc]pyran-3(4H)-one,5,6-dihydro-8-methoxy- (8CI);4,12a-Ethano-12aH-phenanthro[4,4b-bc]pyran-3(4H)-one, 5,6-dihydro-8-methoxy-,[4S-(4a,4aR*,12aa)]-; 5,14-Ethanothebenone,7,8,9,10-tetradehydro-; 7,8,9,10-Tetradehydro-5,14-ethanothebenone