Cc1ccc(C(C)C)c(OCc2ccc(C(=O)N/N=C/c3ccc(C(=O)O)cc3)cc2)c1
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?