Cc1cnc(C(=O)OCC(=O)Nc2cc(-c3cc(C)c(C)cc3C)nn2-c2ccccc2)cn1
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?