Cc1ccc2oc3c(c(=O)c2c1)C(c1cccc(Cl)c1)N(CCCN1CCOCC1)C3=O
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?