p. 10383 - 10389
(2001)p. 1345 - 1348
(2007/10/02)p. 1537 - 1539
(2007/10/02)p. 507 - 510
(2007/10/02)(S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-[(R)-2-(4,4-dimethyl-2-thioxo-oxazolidin-3-yl)-1-methyl-2-oxo-ethyl]-azetidin-2-one
thiophenol
trimethyl-(1-phenylsulfanyl-propenyloxy)-silane
Acetic acid (2R,3R)-3-[1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-1-trimethylsilanyl-azetidin-2-yl ester
4-acetoxy-3-(1-t-butyl-dimethylsilyloxy)ethyl-2-azetidinone
(2R,4R,5R,6S)-6-(1-Hydroxy-ethyl)-4-methyl-3,7-dioxo-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 4-nitro-benzyl ester
1-β-methyl RS-533
(4R,5R,6S)-3-(Diphenoxy-phosphoryloxy)-6-(1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester
(4R,5S,6S)-6-(1-Hydroxy-ethyl)-4-methyl-3-[(S)-1-(4-nitro-benzyloxycarbonyl)-pyrrolidin-3-ylsulfanyl]-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester
(2R,4S,5R,6S)-6-(1-Hydroxy-ethyl)-4-methyl-3,7-dioxo-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 4-nitro-benzyl ester