Cn1cc([N+](=O)[O-])c(C(=O)Nc2ccc(C(=O)N3CCCCC3)cc2)n1
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?