CC(=O)c1ccc(NC(=O)/C(CC(=O)c2sc(-c3cccnc3)nc2C)=N/NC(N)=O)cc1
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?