COCCN(C(=O)CNC(=O)c1ccco1)C(C(=O)NC1CCCCC1)c1cccnc1
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?