Cc1c(NS(=O)(=O)c2ccc(NC3CCCC3)c([N+](=O)[O-])c2)c(=O)n(-c2ccccc2)n1C
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?