CCCc1n[nH]c2c1C(c1ccc(OC)c(CSc3ccccn3)c1)C(C#N)=C(N)O2.CCO
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?