4-hydroxy-7H-pyrido[2,3,4-kl]acridine-6-carbaldehyde 7H-pyrido[2,3,4-kl]acridine-6-carboxaldehyde, 4-hydroxy- InChI=1/C16H10N2O2/c19-8-9-7-13(20)16-14-11(5-6-17-16)10-3-1-2-4-12(10)18-15(9)14/h1-8,18,20