13794-14-4 2-Phenoxybutyric acid 3-06-00-00616 (Beilstein Handbook Reference) BRN 2048912 Butanoic acid, 2-phenoxy- Butyric acid, 2-phenoxy- DL-2-Phenoxybutyric acid EINECS 237-449-9 alpha-Phenoxybutyric acid