p. 997 - 1000
(2007/10/03)(2S,5R,6R)-6-Bromo-6-(1-hydroxy-prop-2-ynyl)-3,3-dimethyl-4,4,7-trioxo-4λ6-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzhydryl ester
(2S,5R)-6,6-dibromo-3,3-dimethyl-4,4,7-trioxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid diphenylmethyl ester
4-azidoaniline
(2S,5R,6R)-6-(1-Hydroxy-prop-2-ynyl)-3,3-dimethyl-4,4,7-trioxo-4λ6-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzhydryl ester