CCOc1ccccc1/C=N/NC(=O)c1nnn(-c2nonc2N)c1CN1CCC(C)CC1
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?