4S-{(1S,8R,11S)-9-N-benzyl-3,9-diaza-10-oxa-2-oxobicylo-[6,3,0]undecan-11-yl}-2,3-di-O-tert-butyldimethylsilyl-1-deoxy-1-(uracil-1-yl)-β-D-erythro-furanose

4S-{(1S,4S,6R,9S)-7-N-(3-aminopropyl)-3,7-diaza-3-N-(3-guanidinopropyl)-8-oxa-2-oxo-4-palmitoylaminobicylo[4,3,0]nonan-9-yl}-1-deoxy-1-(uracil-1-yl)-β-D-erythro-furanose

4S-{(1R,6S,9R)-5-(7-N-benzyl-3-N-(2-cyanoethyl)-3,7-diaza-8-oxa-2-oxobicylo[4,3,0]nonan-9-yl)}-2,3-di-O-tert-butyldimethylsilyl-1-(uracil-1-yl)-β-D-erythro-furanose