2,3'-Imino-1-(β-D-lyxofuranosyl)uracil
(2R)-3t-benzoyloxymethyl-11syn-hydroxy-2,3-dihydro-1H-2r,5c-methano-pyrimido[1,2-c][1,3,5]oxadiazepine-9-thione
(3aS)-2t-benzoyloxymethyl-3c-(toluene-4-sulfonyloxy)-(3ar,9ac)-2,3,3a,9a-tetrahydro-furo[2',3':4,5]oxazolo[3,2-a]pyrimidin-6-one
(2S)-11syn-acetoxy-3t-benzoyloxymethyl-2,3-dihydro-1H-2r,5c-methano-pyrimido[1,2-c][1,3,5]oxadiazepin-9-one
(2R)-3t-benzoyloxymethyl-11syn-hydroxy-2,3-dihydro-1H-2r,5c-methano-pyrimido[1,2-c][1,3,5]oxadiazepin-9-one