9-[2,3-O-(1-methylethylidene)-5-O-(5-{4-[(E)-2-nitrovinyl]phenoxy}-5-oxopentanoyl)pentofuranosyl]-9H-purin-6-amine 9H-purin-6-amine, 9-[2,3-O-(1-methylethylidene)-5-O-[5-[4-[(E)-2-nitroethenyl]phenoxy]-1,5-dioxopentyl]pentofuranosyl]- InChI=1/C26H28N6O9/c1-26(2)40-21-17(39-25(22(21)41-26)31-14-30-20-23(27)28-13-29-24(20)31)12-37-18(33)4-3-5-19(34)38-16-8-6-15(7-9-16)10-11-32(35)36/h6-11,13-14,17,21-22,25H,3-5,12H2,1-2H3,(H2,27,28,29)/b11-10