Patent ID: 7700551

Claim:
A compound of the formula 1 wherein Z a leaving group and at least one of position 1, 2, 3, 4, 5, 6, 7 or 8 is bound to radical Y; Y is a radical containing a semi-synthetic carbohydrate biopolymer, which is bound to a N-succinimidyl moiety; at least one of an available position 1, 2, 3, 4, 5, 6, 7 or 8 is optionally bound to radical X; X is —SO 3 —R 3 ; R 3 is independently selected from the group consisting of hydrogen, (C 1 -C 8 )-alkyl and (C 1 -C 8 )-alkyl-R 4 ; and R 4 is a polymer.