N#C/C(=C\c1c(N2CCCCC2)nc2ccccn2c1=O)C(=O)NC1CCS(=O)(=O)C1
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?