CN(C)c1ccc(/C=C2\N=C(c3ccccc3)N(c3nc4ccc(Sc5ccccc5)cc4[nH]3)C2=O)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?