CC(O)C(=O)O.O=c1c2cc(O)ccc2n2nnc3ccc(NCCNCCO)c1c32
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?