COCCn1c(N)c(NCc2ccccc2)c(=O)n(CC(=O)Nc2cc(C)ccc2C)c1=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?