Nc1ccc(Oc2ccc(C34CC5CC6C3CC3CC4C(C5)C6(c4ccc(Oc5ccc(N)c(O)c5)cc4)C3)cc2)cc1O
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?