2-Amino-4-nitrophenol 154.038 154.12340 C6H6N2O3 CAS:99-57-0 CHEBI:82383 InChI=1S/C6H6N2O3/c7-5-3-4(8(10)11)1-2-6(5)9/h1-3,9H,7H2 KEGG:C19321 Nc1cc(ccc1O)[N+]([O-])=O VLZVIIYRNMWPSN-UHFFFAOYSA-N chebi_ontology 4-nitrophenols