. . "09302400-n"^^ . "a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon"@en-us . "0"^^ . "109302400"^^ . . "108721602"@en-us . "heterocyclic ring"^^ . . . . "0"^^ . . . . . "heterocyclic ring"@en-us . "heterocycle"@en-us . .