ACTIVE OXYGEN SCAVENGERS CONTAINING PTERIN DERIVATIVES

摘要

Active oxygen scavengers containing as the active ingredient pterin derivatives represented by general formula (I) which are optionally cyclized or salts thereof, wherein R<1> and R<2> represent each hydrogen, C1-4 alkyl or acyl represented by the general formula R<3>-CO- (wherein R<3> represents C1-4 alkyl); X represents formyl or hydroxymethyl; A represents a group represented by formula (Ia), and n is 0 or an integer of 1 or above; provided that n is 0 when X is hydroxymethyl and that R<1> and R<2> are each hydrogen and X is formyl when n is an integer of 1 or above.