COC(=O)c1[nH]c2cc(OC)c(OC)cc2c1NC(=O)CN1C[C@@H]2C[C@H](C1)Cn1c2cccc1=O
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?