N#CC1(NC(=O)COc2ccc(S(=O)(=O)N3CCCC3)cc2[N+](=O)[O-])CCCCC1
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?