Cc1ccc(C)c2c1cc(C)c1nnc(SCC(=O)Nc3nc4c(s3)CCCC4)n12
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?