CC[C@@H](C)[C@@H](C(=O)N1CCN(C(=O)OC(C)(C)C)CC1)n1cc(CCCN=C(NC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C)nn1
A lower number of pka indicates that the acid dissociates more entirely in water. What is pka of the molecule?