CC1CN(S(=O)(=O)c2ccc(C(=O)Nc3nnc(-c4ccco4)o3)cc2)CC(C)O1
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?