4-methyl-2-oxopentanoic acid 4-methyl-2-oxo-pentanoic acid 2-keto-4-methyl-valeric acid Isopropylpyruvic acid 2-OXO-4-METHYLPENTANOIC ACID COI 2-Oxoisocaproic acid 68255_FLUKA Ketoleucine 2-KETOISOCAPROIC ACID 4-Methyl-2-oxovaleric acid EINECS 212-435-5 Pentanoic acid, 4-methyl-2-oxo- alpha-Ketoisocaproic acid C00233 2-keto-4-methyl-pentanoate 2-oxo-4-methylpentanoate 2K-4CH3-PENTANOATE 4-methyl-2-oxopentanoate alpha-oxoisocaproate