2-Hydroxy-2-propylvaleric acid 2-phenylhydrazide 3178-52-7 4-15-00-00194 (Beilstein Handbook Reference) BRN 1820239 Pentanoic acid, 2-hydroxy-2-propyl-, 2-phenylhydrazide Phenylhydrazide of dipropylglycolic acid Valeric acid, 2-hydroxy-2-propyl-, 2-phenylhydrazide