CCCc1nc2ccccc2c(=O)n1NC(=O)c1c(O)c2ccccc2n(C)c1=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?