COCCCNC(=O)CCn1c(=O)c2ccccc2n(CC(=O)Nc2c(C)cc(C)cc2C)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?