Patent ID: 7691364

Claim:
A compound of the formula: wherein HO-DRUG-OH, HO-DRUG-COOH, HO-DRUG-NH 2 , and HOOC-DRUG-NH 2 , are biologically active compounds, and selected from the group consisting of adrenalone, apomorphine, azacyclonol, baclofen, diclofenac, dienestrol, diflunisal, etilefrine, fendosal, flufenamic acid, hexylresorcinol, hydroxyethyl salicylate, ifenprodil, mefenamic acid, naproxen, paracetamol, salicylic acid, salsalate, and tolcapone; 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 and 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; and —COCH 2 O(CH 2 CH 2 O) n -where n is an integer between 2 and 24, inclusive; each R′ is independently a hydrogen, benzyl or an alkyl group, the alkyl group being either straight-chained or branched, each p is independently an integer between 1 and 6, inclusive; with the proviso that the resultant compound can only include one COCH 2 O(CH 2 CH 2 O) n moiety.