Patent ID: 7316996

Claim:
A bisacyloxypropylcysteine conjugate according to formula (1), where R 1 and R 2 can be identical or different and are C 8 -C 22 alkyl, alkenyl or alkenyl fatty acid radicals which are bonded by way of the carboxyl group; Y=—NH—, —O—, —S—, or —OCO—; R 3 is a covalently bonded polyethylene glycol (polyoxyethylene)-(CH 2 —CH 2 —O) m —CH 2 —CH 2 —X, where X═O(R), N(R) 2 , S(R) or COO(R), and (R)═H, benzyl-, or C 1-6 alkyl, where, X═N(R) 2 , the (R) groups can be identical or different.