CC(=O)Cn1c(N2CCC(Cc3ccccc3)CC2)nc2c1c(=O)[nH]c(=O)n2C
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?