Cc1ccc(S(=O)(=O)Nc2ccc3c(c2)CC(=O)N([C@H](C)CO)C[C@H](C)[C@H](CN(C)Cc2ccc4c(c2)OCO4)O3)cc1
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?