Nitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone

Full Title

Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom > condensed with one carbocyclic ring > Indoles; Hydrogenated indoles > with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to carbon atoms of the hetero ring > Nitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone