c1ccc2oc(-c3ccc(Nc4nc(N5CCCC5)nc(N5CCOCC5)n4)cc3)nc2c1
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?