Patent ID: 7205333

Claim:
A compound according to the formula (I): in which: X is O or CH 2 ; R is an azido group, a hydroxy group, an optionally substituted guanidino group, an optionally substituted amino group, an optionally substituted amidine, or an optionally substituted imidate; R 2 is COCR 3 3 or SO 2 CR 3 3 ; R 3 is independently selected from H, F, Cl, Br, I and C 1-6 alkyl; n is an integer of from 2 to 128; Y is —O, —O(C═O), —NR 4 , —NR 4 CO, —O(C═O)NR 4 , —O(C═S)NR 4 , —NR 4 (C═O)O, —NR 4 (C═S)O, —NR 4 (C═O)NR 4 , —NR 4 (C═S)NR 4 , —NR 4 SO, —NR 4 SO 2 , —NR 4 SONR 4 , or —NR 4 SO 2 NR 4 in which R 4 is H or C 1-6 alkyl; CG is a core group selected from an optionally substituted cycloalkyl, straight or branched group or a combination thereof having from 1 to 200 atoms in its backbone, in which the backbone atoms are selected from C, N, O and S; and L is a linking group of from 0 to 20 backbone atoms, in which the backbone and terminal atoms are selected from C, N, O and S; or a pharmaceutically acceptable derivative, pharmaceutically acceptable salt, geometric isomer or stereoisomer thereof.