the nitrogen atom being part of a heterocyclic ring

Full Title

Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid (carbon tetrahalides A01N29/02) > the carbon atom having one or more single bonds to nitrogen atoms > Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof > the nitrogen atom being part of a heterocyclic ring