C/C=C\C(=O)Nc1cccc(C2=NOC3(C2)C[C@H](C(N)=O)N(C(=O)[C@H]2CCC(=O)N2)C3)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?