with the ring nitrogen atoms directly attached to carbocyclic rings

Full Title

Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms > containing only hydrogen and carbon atoms in addition to the ring hetero elements > containing only one hetero ring > with the ring nitrogen atoms directly attached to carbocyclic rings