Cc1ccc(CNS(=O)(=O)c2ccc3[nH]c4c(c3c2)CCCCC4)cc1
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?