8I8: [[(2~{R},3~{S})-5-(6-aminopurin-9-yl)-4-oxidanyl-3-phosphonooxy-oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(3~{R})-4-[[(3~{S})-3-[2-[(1~{S})-1-[[(1~{S},2~{R},3~{R},4~{S},5~{R})-5-azanyl-3-[(4~{S},5~{R})-4-[(2~{S},3~{R},4~{R},5~{S},6~{E})-3-azanyl-6-(azanylmethylidene)-4,5-bis(oxidanyl)oxan-2-yl]oxy-5-(hydroxymethyl)-3-oxidanyl-oxolan-2-yl]oxy-2-[(2~{S},3~{R},4~{R},5~{S})-3-azanyl-6-(iminomethyl)-4,5-bis(oxidanyl)oxan-2-yl]oxy-4-oxidanyl-cyclohexyl]amino]-1-oxidanyl-ethyl]sulfanylethylamino]-3-oxidanyl-propyl]amino]-2,2-dimethyl-3-oxidanyl-4-oxidanylidene-butyl] hydrogen phosphate