Cc1cn2c(=O)c(S(=O)(=O)Nc3ccc(N4CCOCC4)cc3)c(C)nc2s1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?