COc1cccc(CSc2nc3n(n2)C(c2ccccc2C)C(C(=O)Nc2ccccc2OC)=C(C)N3)c1
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?