Synonyms: CLONIDINE-D4 HCL (IMIDAZOLINE-4,4,5,5-D4);CLONIDINE-D4 HYDROCHLORIDE (IMIDAZOLINE-4,4,5,5-D4);2-(2,6-Dichloroanilino)-2-imidazoline-d4;Catapresan-d4;Catapres-d4;Clonidine-d4 Hydrochloride;N-(2,6-Dichlorophenyl)-4,5-dihydro-1H-imidazol-d4-2-amine;ST-155-d4