CCn1c(CN2CCCCC2)nc2cc(NC(=O)c3ccc([N+](=O)[O-])cc3)ccc21
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?