Cc1ccc(S(=O)(=O)Nc2ccccc2C(=O)N2CCCCC2C)c(C)c1NS(C)(=O)=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?