Synonyms: L(+)-Leucine;.alpha.-Aminoisocaproic acid;2-Amino-4-methylpentanoic acid, (S)-;L-Norvaline, 4-methyl-;L-alpha-Aminoisocaproic acid;Leucine (USP);2-Amino-4-methylvaleric acid (L);(2S)-alpha-Leucine;Pentanoic acid, 2-amino-4-methyl-, (S)-;(S)-2-Amino-4-methyl-pentanoic acid;Leucine, L-;2-Amino-4-methylpentanoic acid;(S)-(+)-leucine;Pentanoic acid, 2-amino-4-methyl-;Leu;Valeric acid, 2-amino-4-methyl-, (S)-;(2S)-2-azaniumyl-4-methyl-pentanoate;(S)-2-Amino-4-methylvaleric acid;(2S)-2-amino-4-methylpentanoic acid;Norvaline, 4-methyl-;L-Leuzin;L-2-Amino-4-methylpentanoic acid;(2S)-alpha-2-Amino-4-methylvaleric acid;FEMA No. 3297;2-Amino-4-methylpentanoic acid (L);(S)-leucine;