1331-16-4 1866-94-0 3-Methylbutane-1-carboxylic acid 38784-67-7 4-02-00-00944 (Beilstein Handbook Reference) 4-METHYLPENTANOIC ACID 4-Methylvaleric acid 646-07-1 AI3-04161 BRN 1741912 EINECS 211-464-0 FEMA No. 3463 Isobutylacetic acid Isocaproic acid Isohexanoic acid Isohexanoic acid (mixed isomers) NSC 4126 Pentanoic acid, 4-methyl- Valeric acid, 4-methyl- Valeric acid, 4-methyl- (8CI)