CCOC(=O)c1[nH]c(C)c(C(=O)OCC(=O)N(C)C2CCS(=O)(=O)C2)c1C
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?