having four-membered rings, e.g. azetidine

Full Title

Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins > having four-membered rings, e.g. azetidine

Classification Context

Section:

HUMAN NECESSITIES

Class:

MEDICAL OR VETERINARY SCIENCE; HYGIENE

Subclass:

PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES