The present invention pertains to type II and type III crystals of 9-ethyl-6,6-dimethyl-8-(4-morpholin-4-yl-piperidin-1-yl)-11-oxo -6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile which are pharmacologically useful novel crystals.La presente invención se refiere a cristales de tipo II y tipo III de 9-etil-6,6-dimetil-8-(4-morfolin-4-il-piperidin-1-il)-11-ox o-6,11-dihidro-5H-benzo[b]carbazol-3-carbonitrilo que es un cristal novedoso farmacéuticamente útil.
