CCOC(=O)/C(=C\c1cccnc1)C(=O)c1cc(C(C)=O)c(Nc2ccccc2)s1
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?