CCCCn1c(SCC(=O)NC2CCS(=O)(=O)C2)nc2cc(S(N)(=O)=O)ccc21
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?