Cc1cccc(NC(=O)CC(C)S(=O)(=O)c2ccc3c(c2)NC(=O)CO3)c1C
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?