(2S)-2-amino-4-{[1-(6-oxo-1,6-dihydro-9H-purin-9-yl)-1,5-dideoxy-beta-D-ribofuranos-5-yl]sulfanyl}butanoic acid
(2s)-2-amino-4-{[1-(6-oxo-1,6-dihydro-9h-purin-9-yl)-1,5-dideoxy-beta-d-ribofuranos-5-yl]sulfanyl}butanoic acid