Cn1nc(C(=O)N2CCN(c3ccc([N+](=O)[O-])cc3)CC2)c2c1-c1ccccc1S(=O)(=O)C2
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?