NC(=O)c1noc(C(=O)N(CC(=O)NC2CCCC2)Cc2ccc3c(c2)OCO3)c1N
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?