O=C(N[C@H]1C/C=C\C[C@@H](CC(=O)N(CCO)Cc2ccccc2)C(=O)N2CCC[C@H]2COC1=O)OCC1c2ccccc2-c2ccccc21
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?