CI.O=C(CCC1CCCCN1)Nc1ccc2c(c1)C(=O)c1ccc(NC(=O)CCN3CCCCC3)cc1C2=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?