Ethopabate-d5 (Ethyl pabate-d5) is the deuterium labeled Ethopabate. Ethopabate (Ethyl pabate) is an orally active antiparasitic agent. Ethopabate is often used in combination with Amprolium hydrochloride (HY-B0937A) and others to prevent and treat poultry coccidiosis, leucosis, and other diseases[1][2][3].