CC(C(=O)Nc1ccc2c(c1)OCCO2)N(c1ccccc1)S(C)(=O)=O
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?