CCC(NC(=O)CCc1c(C)c2cc3c(C)c(C)oc3cc2oc1=O)C(=O)N[C@@H](Cc1ccccc1)C(=O)O
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?