Cc1ccc(NS(=O)(=O)c2cc([N+](=O)[O-])ccc2N/N=C/c2sc(N3CCOCC3)nc2-c2ccccc2)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?