Purine derivatives

Abstract From the Canadian patent

New piperidinoalkyl derivatives of purine of the formula (I):-, wherein R1 is a hydrogen atom or a lower alkyl radical R2 is, a hydrogen atom, an aryl or a lower alkyl radical which is optionally substituted by hydroxyl or R1 and R2 together with, the nitrogen atom to which they are attached can also form a, heterocyclic ring and R3 is a hydrogen atom or an acyl radical; and the acid addition pharmaceutically acceptable pharmacologically compatible salts thereof with non-toxic inorganic or organic pharmacologically acceptable acids have anti-allergic, anti-inflammatory and anti-oedematous activities.