p. 2865 - 2874
(2007/10/02)benzyl (2S,5R,6R)-6-amino-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
2,4,5-trichlorobenzensulfonyl chloride
benzyl 6β-(2,4,5-trichlophenylsulphonylamino)penicillanate
2,2,2-Trichloroethyl chloroformate