CCCCOc1ccc(C2c3c(oc4ccc(C)cc4c3=O)C(=O)N2CCCN(C)C)cc1OCC
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?