CCCN(CCC)CCCNC(=O)CNC(=O)c1nn(-c2ccc(OC)cc2)c(=O)c2ccccc12
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?