Cc1ccc(S(=O)(=O)N2C(=O)CCC2C(=O)Nc2ccc3c(c2)OCCO3)cc1
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?