(((1-(2,4-DIOXO-5-METHYL-1,2,3,4-TETRAHYROPYRIMIDIN-1-YL)-2-DEOXY-BETA-D-ERYTHRO-PENTOFURANOS-5-YL)OXY)METHOXYPHOSPHINYL)ACETIC ACID ETHYL ESTER OXIDE
(((1-(2,4-dioxo-5-methyl-1,2,3,4-tetrahyropyrimidin-1-yl)-2-deoxy-beta-d-erythro-pentofuranos-5-yl)oxy)methoxyphosphinyl)acetic acid ethyl ester oxide