Compound selected from 8-methoxy-4,11,11b-trimethyl-1,2,4,6,11,11b-hexahydro-pyrido [3,2-5 a] carbazol-3-one； 11- (2-dimethylamino-ethyl) -6,11-dihydro-5-thia-11-aza-benzo [a] fluoren-8-ol； 11- [4- (2-Piperidin-1-yl-ethoxy) -benzyl] -6,11-dihydro-5-thia-11-aza-benzo [a] fluoren-8-ol； 8-hydroxy-4,11-dimethyl-1,2,4,6,11,11b-hexahydro-pyrido [3,2-a] carbazol-3-one； or a pharmaceutically acceptable salt thereof.Compuesto seleccionado de entre 8-metoxi-4,11,11b-trimetil-1,2,4,6,11,11b-hexahidro-pirido[3,2-5 a]carbazol-3-ona； 11-(2-dimetilamino-etil)-6,11-dihidro-5-tia-11-aza-benzo[a]fluoren-8-ol； 11-[4-(2-piperidin-1-il-etoxi)-bencil]-6,11-dihidro-5-tia-11-aza-benzo[a]fluoren-8-ol； 8-hidroxi-4,11-dimetil-1,2,4,6,11,11b-hexahidro-pirido[3,2-a]carbazol-3-ona； o una sal del mismo farmacéuticamente aceptable.
