2,7-DN-Ddtdp 2,7-Dinitro-4,9-dioxy-5,10-dioxo-4,5,9,10-tetrahydro-4,9-diazapyrene 4,9-Dihydro-4,9-dihydroxy-2,7-dinitro-pyrido(2,3,4,5-lmn)phenanthridine-5,10-dione 72979-21-6 Pyrido(2,3,4,5-lmn)phenanthridine-5,10-dione, 4,9-dihydro-4,9-dihydroxy-2,7-dinitro-