CCN=C(S)N(CCc1cccc(C)c1)Cc1cc2cc(OC)c(OC)cc2nc1O
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?