Cc1ccc(NC(=O)Cn2c(=O)n(Cc3nc(C)no3)c(=O)c3cc4c(cc32)OCO4)c(Cl)c1
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?