1 HR6 (2s,4ar,6r,7r,7as)-6-[6-amino-8-(benzylsulfanyl)-9h-purin-9-yl]-2-sulfanyltetrahydro-4h-furo[3,2-D][1,3,2]dioxaphosphinin-7-ol 2-oxide 1.000 2 HR4 (2s,4ar,6r,7r,7as)-6-{6-amino-8-[(4-fluorobenzyl)sulfanyl]-9h-purin-9-yl}-2-sulfanyltetrahydro-4h-furo[3,2-D][1,3,2]dioxaphosphinin-7-ol 2-oxide 0.968 3 RP1 6-(6-amino-purin-9-yl)-2-thioxo-tetrahydro-2-furo[3,2-D][1,3,2]dioxaphosphinine-2,7-diol 0.733 4 SP1 6-(6-amino-purin-9-yl)-2-thioxo-tetrahydro-2-furo[3,2-D][1,3,2]dioxaphosphinine-2,7-diol 0.733 5 75G (2s,4ar,6r,7r,7as)-6-(6-amino-2-chloro-9h-purin-9-yl)-7-hydroxy-2-sulfanyltetrahydro-2h,4h-2lambda~5~-furo[3,2-D][1,3,2]dioxaphosphinin-2-one 0.710 6 RP2 (2r,4ar,6r,7r,7as)-6-(6-amino-8-bromo-9h-purin-9-yl)tetrahydro-4h-furo[3,2-D][1,3,2]dioxaphosphinine-2,7-diol 2-sulfide 0.710