Cc1ccc(NC(=O)Cn2c(-c3ccc4c(c3)OCO4)cn(-c3ccccc3)c2=O)cc1C
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?