CCC1=C2CC[C@H]3C(=O)NC(=O)[C@H]3[C@H]2[C@@]2(C)/C(=N/CCc3c[nH]c4ccccc34)OC(=O)N2C1=O
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?