has functional parent is tautomer of formamide formic acid carboximidic acid formimidic acid 0 45.02146 45.04066 A carboximidic acid that is formic acid in which the carbonyl oxygen is replaced by an imino group. Beilstein:1918433 CH3NO CHEBI:48431 InChI=1S/CH3NO/c2-1-3/h1H,(H2,2,3) PMID:16331898 Reaxys:1918433 ZHNUHDYFZUAESO-UHFFFAOYSA-N [H]C(O)=N chebi_ontology imidoformic acid one-carbon compound