Cc1ccc(-n2c(SCC(=O)Nc3ccc4c(c3)OCCO4)nc3c([nH]c4ccccc43)c2=O)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?