p. 2123 - 2127
(2007/10/03)(2-tert-butoxycarbonylamino-thiazol-4-yl)-methoxyimino-acetic acid ethyl ester
(6R,7R)-3-Acetylsulfanyl-8-oxo-7-phenylacetylamino-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester
(Z)-2-(2-tert-butoxycarbonylaminothiazol-4-yl)-2-methoxyiminoacetic acid
(6R,7R)-benzhydryl 3-hydroxy-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
di-tert-butyl dicarbonate