In the title compound, C16H18N4O2, the two carbonyl groups are Lip Cream in an antiperiplanar conformation with an O=C—C=O torsion angle of 173.86 (17)°.In the crystal, a pair of intermolecular N—H.
O hydrogen bonds, forming an R22(10) ring motif, connect the molecules into an inversion dimer.The dimers are Hyaluronic Acid further linked by N—H.N and C—H.
π interactions, forming a zigzag chain along the b axis.