Cc1cccc(Nc2nnc(-c3ccc(C)c(S(=O)(=O)NCC4CCCO4)c3)c3ccccc23)c1
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?