(+-)-Ethionine 2-Amino-4-(ethylthio)butyric acid 4-04-00-03194 (Beilstein Handbook Reference) 67-21-0 Aethionin BRN 1722529 Butyric acid, 2-amino-4-(ethylthio)-, DL- Butyric acid, DL-2-amino-4-(ethylthio)- CCRIS 288 CN 8676 DL-2-Amino-4-(ethylthio)butyric acid DL-ETHIONINE DL-Homocysteine, S-ethyl- EINECS 200-647-0 Ethionine DL- Homocysteine, S-ethyl- NSC 751 S-Ethyl-DL-homocysteine U-1434