CCN(CC)CCCN1C(=O)C(O)=C(C(=O)c2cc3cccc(OC)c3o2)C1c1ccncc1
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?