p. 5331 - 5334
(2007/10/02)p. 4382 - 4394
(2007/10/02)p. 2505 - 2513
(2007/10/02)(3S*,4R*)-1-tert-butyldimethylsilyl-3-(1,2-dihydroxy-2-propyl)-4-triphenylmethylthio-2-azetidinone
1-(tert-Butyl-dimethyl-silanyl)-3-(1-hydroxy-ethyl)-4-tritylsulfanyl-azetidin-2-one
(3S,4R)-3-Acetyl-1-(tert-butyl-dimethyl-silanyl)-4-tritylsulfanyl-azetidin-2-one
tert-butyldimethylsilyl chloride
1-(tert-Butyl-dimethyl-silanyl)-3-[1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-tritylsulfanyl-azetidin-2-one
p-methoxybenzyl (5R*,6S*)-6-<(R*)-1-hydroxyethyl>-2-(1,3,4-thiadiazol-2-yl)thiomethylpenem-3-carboxylate
p-methoxybenzyl (5R*,6S*)-6-<(R*)-1-hydroxyethyl>-2-(1-methyl-1H-tetrazol-5-yl)thiomethylpenem-3-carboxylate
p-methoxybenzyl (5R*,6S*)-6-<(R*)-1-hydroxyethyl>-2-<1-(2-hydroxyethyl)-1H-tetrazol-5-yl>thiomethylpenem-3-carboxylate
p-methoxybenzyl (5R*,6S*)-2-(1-carbamoylmethyl-1H-tetrazol-5-yl)-6-<(R*)-1-hydroxyethyl>penem-3-carboxylate
(3S*,4R*)-3-<(R*)-1-tert-butyldimethylsilyloxyethyl>-4-chloroacetoxythio-1-(p-methoxybenzyloxycarbonyl)triphenylphosphoranylidenemethyl-2-azetidinone