Cc1ccc(C(=O)NC(=S)Nc2ccc3[nH]c(O)nc3c2)c(C)c1
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?