CCOC(=O)c1ccc(N2C(=O)c3[nH]nc(C)c3C2c2ccc(O)cc2)cc1
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?