Patent ID: 8409559

Claim:
A compound selected from the group consisting of: wherein DRUG-OH, DRUG-COOH and DRUG-NH 2 are compounds selected from the group consisting of NSAIDs (non-steroidal anti-inflammatory drugs) and pain-reducing agents; wherein each X represents a member independently selected from the group consisting of: —CH 2 COO— (glycolic acid moiety), —CH(CH 3 )COO— (lactic acid moiety), —CH 2 CH 2 OCH 2 COO— (dioxanone moiety), —CH 2 CH 2 CH 2 CH 2 CH 2 COO— (caprolactone moiety), —(CH 2 ) y COO— where y is one of the numbers 2,3,4 or 6-24 inclusive, and —(CH 2 CH 2 O) z CH 2 COO— where z is an integer between 2 and 24, inclusive; each Y represents a member independently selected from the group consisting of: —COCH 2 O— (glycolic ester moiety), —COCH(CH 3 )O— (lactic ester moiety), —COCH 2 OCH 2 CH 2 O— (dioxanone ester moiety), —COCH 2 CH 2 CH 2 CH 2 CH 2 O— (caprolactone ester moiety), —CO(CH 2 ) m O— where m is an integer between 2-4 and 6-24 inclusive, —COCH 2 —O(CH 2 CH 2 O) n — where n is an integer between 2 and 24, inclusive; and R′ is hydrogen, benzyl or an alkyl group, the alkyl group being either straight-chained or branched; and p is an integer between 1 and 4, inclusive.