(1R,6R,8R,9R,10S,15R,17R,18R)-17-(6-aminopurin-9-yl)-8-(4-aminopyrrolo(2,3-d)pyrimidin-7-yl)-3-hydroxy-12-oxo-12-sulfanyl-3-sulfanylidene-2,4,7,11,13,16-hexaoxa-3λ5,12λ5-diphosphatricyclo(13.2.1.06,10)octadecane-9,18-diol
(1r,6r,8r,9r,10s,15r,17r,18r)-17-(6-aminopurin-9-yl)-8-(4-aminopyrrolo(2,3-d)pyrimidin-7-yl)-3-hydroxy-12-oxo-12-sulfanyl-3-sulfanylidene-2,4,7,11,13,16-hexaoxa-3λ5,12λ5-diphosphatricyclo(13.2.1.06,10)octadecane-9,18-diol