CC(C)(O)C#Cc1ccc(C(=O)N2CCCC(CNS(=O)(=O)c3cccs3)C2)o1
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?