Cc1c(NC(=O)COC(=O)CCc2c[nH]c3ccccc23)c(=O)n(-c2ccccc2)n1C
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?