A61K31/395
having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
A61K31/395
having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
A61K31/435
having six-membered rings with one nitrogen as the only ring hetero atom
A61K31/435
having six-membered rings with one nitrogen as the only ring hetero atom
A61K31/44
Non condensed pyridines; Hydrogenated derivatives thereof
A61K31/44
Non condensed pyridines; Hydrogenated derivatives thereof
A61K31/445
Non condensed piperidines, e.g. piperocaine
A61K31/445
Non condensed piperidines, e.g. piperocaine
A61K31/451
having a carbocyclic group directly attached to the heterocyclic ring, e.g. glutethimide, meperidine, loperamide, phencyclidine, piminodine
A61K31/451
having a carbocyclic group directly attached to the heterocyclic ring, e.g. glutethimide, meperidine, loperamide, phencyclidine, piminodine