O=C(NC1CCCCC1)C(c1ccc(O)c(O)c1)N(C(=O)Cn1nnc2ccccc21)c1cccc(O)c1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?