has role cyanide hydrogen cyanide [CHN] HCN CHEBI:18407 A one-carbon compound consisting of a methine group triple bonded to a nitrogen atom formonitrile CHEBI:5786 CHEBI:13362 Cyanwasserstoff hydrogen cyanide chebi_ontology Blausaeure Hydrogen cyanide hydrocyanic acid hydracid hydrogen isocyanide one-carbon compound poison Escherichia coli metabolite human metabolite