CCCCn1c(N)c(N(CC(C)C)C(=O)CSc2nnc(C)n2-c2ccccc2)c(=O)[nH]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?