Hydrogel compositions and uses thereof

A compound of formula (I):

• HAP-K (I),
• wherein
• HAP is a hyaluronan polymer;
• and
• K is a moiety covalently linked to the hyaluronan polymer having the structure of formula (Ia) or formula (Ib):
• wherein
• RX is C1-20 alkylene, C2-20 alkenylene, C2-20 alkynylene, C1-20 heteroalkylene, C2-20 heteroalkenylene, or C2-20 heteroalkynylene, any of which is optionally substituted with one or more of oxo, halogen, hydroxyl, alkoxy, azido, cyano, nitro, amino, and thiol;
• and
• R1 is C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C1-6 heteroalkyl, C2-6 heteroalkenyl, C2-6 heteroalkynyl, C3-10 carbocyclyl, C6-10 aryl, C2-9 heterocyclyl, or C2-9 heteroaryl, any of which is optionally substituted with one or more of oxo, halogen, hydroxyl, alkoxy, azido, cyano, nitro, amino, and thiol,
• or a salt thereof.