11H-3-Oxo-3,4-dihydropyrido(3,2-a)carbazole 127040-41-9 3H-Pyrido(3,2-a)carbazol-3-one, 4,11-dihydro- 4,11-Dihydro-3H-pyrido(3,2-a)carbazol-3-one BRN 4254812