10H-Phenothiazine, 3,7-dinitro-, 5-oxide 3,7-Dinitro-5-oxophenothiazine 3,7-Dinitrophenothiazine 5-oxide 574-81-2 Dinitrodiphenylamine sulfoxide NSC18426 Phenothiazine, 3,7-dinitro-, 5-oxide