Cc1c(C)c2ccc(OCC(=O)Nc3cccnc3)c(C)c2oc1=O
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?