p. 4049 - 4052
(2007/10/02)(2-{(S)-4-[(E)-3-(tert-Butyl-dimethyl-silanyloxy)-propenyl]-2,2-dimethyl-oxazolidin-3-yl}-2-oxo-ethyl)-carbamic acid tert-butyl ester
(1S,2S,3S)-2-((S)-1-tert-Butoxycarbonylamino-2-hydroxy-ethyl)-3-methoxymethyl-cyclopropanecarboxylic acid
(1S,1aS,1bS,5aS)-1-(tert-Butyl-dimethyl-silanyloxymethyl)-4,4-dimethyl-tetrahydro-3-oxa-4a-aza-cyclopropa[a]pentalen-5-one
(1S,1aS,1bS,5aS)-1-Methoxymethyl-4,4-dimethyl-tetrahydro-3-oxa-4a-aza-cyclopropa[a]pentalen-5-one
(1S,1aS,1bS,5aS)-1-Hydroxymethyl-4,4-dimethyl-tetrahydro-3-oxa-4a-aza-cyclopropa[a]pentalen-5-one