Cc1c(C)c2c(OCC(=O)N[C@@H](Cc3ccccc3)C(=O)O)cc3c(c2oc1=O)CCC(C)(C)O3
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?