Cc1cc2oc3c(c(=O)c2cc1C)C(c1ccc(C(C)C)cc1)N(c1nc(C)c(C)s1)C3=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?