C=C1C(O)C23CCC4C(C(=O)O)(C(=O)O)CC(OC5OC(CO)C(O)C(OC(=O)CCc6ccccc6)C5NC(=O)CC(C)C)CC4(C)C2CCC1(O)C3
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?