CCCS(=O)(=O)c1c(S(=O)(=O)CCC)c2c(C)cccn2c1C(=O)N/N=C\c1c[nH]c2ccccc12
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?