Piperidines Patents (Class 514/315)
- The additional ring is a six-membered hetero ring consisting of one nitrogen and five carbon atoms (Class 514/318)
- The additional ring is one of the cyclos in a polycyclo ring system (Class 514/319)
- The additional ring is a hetero ring (Class 514/326)
- Chalcogen bonded directly to ring carbon of the piperidine ring (Class 514/327)
- Nitrogen attached directly to the piperidine ring by nonionic bonding (Class 514/329)
- C=X bonded directly to the piperidine ring (X is chalcogen) (Class 514/330)
- Nitrogen attached indirectly to the piperidine ring by nonionic bonding (Class 514/331)