CCOC(=O)N1CCC(N=C(S)Nc2ccc3nc(N4CCN(CC)CC4)cc(C)c3c2)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?