for the following products
(R)-3-((tert-Butoxycarbonyl)amino)-4-methylpentanoic acid | (R)-N-Boc-3-Amino-4-methylpentanoic acid | Boc-L-beta-Homovaline | N-beta-(tert-Butyloxycarbonyl)-L-homovaline and (3R)-3-[[(1,1-Dimethylethoxy)carbonyl]amino]-4-methyl-pentanoic acid
