CCN(CC)S(=O)(=O)c1ccc(O)c(C(=O)OCC(=O)N(C)Cc2ccccc2)c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?