Cc1ccc(C2=NN(C(=O)COc3ncnc4ccccc34)C(c3ccco3)C2)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?