C. In the mechanism of alcohol dehydrogenase reducing acetaldehyde to ethanol, NADH donates a hydride to the carbonyl C, and the oxyanion is transiently stabilized by the Zn2+ divalent cation (see figure on first page), which is then protonated to form the final product. If one assumes that 4-iodopyrazole was bound similarly to the substrate, then which atoms of the inhibitor would be equivalent to the atoms of acetaldehyde? Mark the figure below with the atom of 4-iodopyrazole equivalent to each of the 3 heavy atoms in acetaldehyde. (Use the atom identifiers to identify each one unambiguously: N1. N2, C3, C4, C5, I4.)