Biodegradable copolymer from hydroxy proline

Abstract

A biodegradable copolymer having the constituent units represented by the structures (I) and (II): ##STR1## wherein X represents a hydrogen atom, an acyl group having the formula RCO-- where R is a hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group having to 20 carbon atoms, and Y represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and m and n are independently integers of 1 or more, m+n is at least 10, and m/(m+n) is at least 0.01 and a pharmaceutical composition containing the same.

Dependencies are inferred from the claim text.