- Imidazoline compounds
- Imidazolidin compounds
- Pyrrolidine compounds
- Pyrroline compounds
- Tetrahydropyran compounds
- Oxazoline compounds
- Oxazolidine compounds
- Tetrahydrofuran compounds
- Thiomorpholine compounds
- Morpholine compounds
- Piperidine compounds
- Piperazine compounds
- Thiazolidine compounds
- Azetidine compounds
- Dioxolane compounds
- Meta-dioxole compounds
- Oxane compounds
- Oxetane compounds
- Aziridine compounds
- Other aliphatic heterocycles compounds