. "2-({[3-(tert-Butyl-dimethyl-silanyloxy)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethyl]-carbamoyl}-methyl)-4-(tert-butyl-diphenyl-silanyloxy)-2-methyl-pyrrolidine-1-carboxylic acid tert-butyl ester" . "13" . . . . . .