Benzoic acid 2-[(2R,3S,5R)-3-{2-[(2R,3S,5R)-3-mercaptomethyl-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-yl]-ethanesulfonylmethyl}-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-yl]-ethyl ester

1-((2R,4S,5R)-4-(((bis(4-methoxyphenyl)(phenyl)methyl)thio)methyl)-5-(2-((((2R,3S,5R)-2-(2-bromoethyl)-5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-3-yl)methyl)sulfonyl)ethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione