CCc1cc(=O)oc2cc(OCC(=O)NC[C@H]3CC[C@H](C(=O)O)CC3)ccc12
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?