1 U4Y (2s)-4-({[(2s,3s,4r,5r)-5-(6-amino-9h-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methyl}sulfanyl)-2-{[(2e)-3-(cis-4-hydroxycyclohexa-2,5-dien-1-yl)prop-2-enoyl]amino}butanoic acid 1.000 2 SXZ (2s)-4-({[(2s,3s,4r,5r)-5-(6-amino-9h-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methyl}sulfanyl)-2-[(3-methylbutanoyl)amino]butanoic acid 0.769