Choose starting materials and reagents from the following tables for synthesis of leucine by either the acetamidomalonate or reductive amination method. specify starting material (by number) first. specify reagents in order of use by letter) second. example: 2be starting materials diethyl acetamidomalonate 3-methyl-2-oxo-hexanoic acid 2 diethyl malonate 3-methyl-2-oxo-pentanoic acid 3 ch sch2ch2-co-co2h 3-methyl-2-oxo-butanoic acid reagents a h307, heat d methyl iodide g benzyl bromide b sodium ethoxide 2-bromobutane h h2 over pd/c c nh3 / nabh 1-bromo-2-methylpropane