Cc1ccc(C(C)C)c(OCC(=O)Nc2ccc3c(c2)nc(CCNC(=O)c2ccco2)n3C)c1
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?