Yasuda, Stanley K. published the artcileIdentification of N-nitroso- and nitrodiphenylamines by two-dimensional thin-layer chromatography, Product Details of C12H9N3O4, the publication is Journal of Chromatography (1964), 14(1), 65-70, database is CAplus and MEDLINE.
By two-dimensional thin-layer chromatography on silica gel containing Zn dust, derivatives of diphenylamine (I) were separated and identified with p-diethylaminobenzaldehyde. Products from I in PBX explosives, as well as those prepared by treatment of I and 2-nitrodiphenylamine with N2O4, were identified. Derivatives of I studied were the 2-nitro, N-nitroso, N-nitroso-4-nitro, 2,4-dinitro, 2,4,6-trinitro, 2,4′-dinitro, 2,2′-dinitro, N-nitroso-4,4′-dinitro, N-nitroso-2-nitro, 4-nitro, N-nitroso-2,4′-dinitro, 2,4,4′-trinitro, 2,2′,4-trinitro, N-nitroso-2,2′-dinitro, 4-nitroso, 2,2′,4,4′-tetranitro, 2,2′,4,4′,6-pentanitro, 4,4′-dinitro, and 2,2′,4,4′,6,6′-hexanitro.
Journal of Chromatography published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C21H24O8, Product Details of C12H9N3O4.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia