Nc1cccc(C(=O)OCC(=O)Nc2cccc3c2C(=O)c2ccccc2C3=O)c1
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?