4-[2-[[6-Amino-9-(N-ethyl--D-ribofuranuronamidosyl)-9H-purin-2-yl]amino]ethyl]benzenepropanoic Acid Hydrochloride 2-p-(2-Carboxyethyl)phenethylamino-5μ-N-ethylcarboxamidoadenosine hydrate hydrochloride CGS-21680 hydrate hydrochloride 4-[2-[[6-Amino-9-(N-ethyl-beta-D-ribofuranuronamidosyl)-9H-purin-yl]amino]ethyl]benzenepropanoic acid hydrochloride 2-p-(2-Carboxyethyl)phenethylamino-5'-N-ethylcarboxamidoadenosine hydrochloride hydrate CGS-21680 hydrochloride hydrate 3-{4-[2-({6-Amino-9-[(2R,3R,4S,5S)-5-(ethylcarbamoyl)-3,4-dihydroxytetrahydrofuran-2-yl]-9H-purin-2-yl}amino)ethyl]phenyl}propanoic acid hydrochloride 2-(4-(2-((6-aMino-9-((3R,4S,5S)-5-(ethylcarbaMoyl)-3,4-dihydroxytetrahydrofuran-2-yl)-9H-purin-2-yl)aMino)ethyl)phenyl)acetic acid hydrochloride