CCOC(=O)N1CCc2c(sc3c2c(=O)n(CCc2ccccc2)c(=O)n3CC(=O)Nc2ccc(C)cc2)C1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?