CC(C)[C@H](NS(=O)(=O)c1ccccc1)C(=O)OCn1nnc2ccccc2c1=O
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?