(2008/06/13)
diethyl acetylmalonate
benzylamine
Ketene
3-Benzylamino-2-pentenedioic acid diethyl ester
(5R,6S)-3-(Diphenoxy-phosphoryloxy)-6-((R)-1-hydroxy-ethyl)-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester
4-{(2R,3S)-1-(tert-Butyl-dimethyl-silanyl)-3-[(S)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-3-oxo-butyric acid 4-nitro-benzyl ester
(2S,3R)-3-Amino-2-((S)-1-hydroxy-ethyl)-pentanedioic acid 5-benzyl ester; hydrochloride
(2R,3R,4S)-4-Benzylamino-2-methyl-6-oxo-tetrahydro-pyran-3-carboxylic acid; hydrochloride
{(2R,3S)-1-(tert-Butyl-dimethyl-silanyl)-3-[(S)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-acetic acid benzyl ester