Patent ID: 7928163

Claim:
A compound of Formula (XX) having the structure: X-L-O—NH 2 (Formula XX) wherein: X is a polyalkylene glycol or polyalkylene glycol substituted with a moiety; wherein A is an alkylene group; R′ is H or an alkyl; and wherein is attached directly to polyalkylene glycol at one end and L at the other end; or A is attached directly to polyalkylene glycol and NR' is attached to L; L is selected from the group consisting of alkylene, substituted alkylene, alkenylene, substituted alkenylene, —O-(alkylene or substituted alkylene)-, —S-(alkylene or substituted alkylene)-, —S(O) k (alkylene or substituted alkylene)-, where k is 1, 2, or 3, —C(O) -(alkylene or substituted alkylene)-, —C(S)-(alkylene or substituted alkylene)-, —NR′-(alkylene or substituted alkylene)-, —CON(R′)-(alkylene or substituted alkylene)-, -(alkylene or substituted alkylene)NR′C(O)O—(alkylene or substituted alkylene)-, —O—CON(R′)-(alkylene or substituted alkylene)-, —CSN(R′) -(alkylene or substituted alkylene)-, —N(R′)C(O)O—(alkylene or substituted alkylene)-, and —N(R′)C(O)N(R′)-(alkylene or substituted alkylene)-; and each R′ is independently H, alkyl, or substituted alkyl; wherein each H of the amine group of the hydroxylamine moiety may be independently replaced with an amino protecting group.