6-kloronikotinska kiselina
4-nitrobensyl (7R)-7-amino-3-((2S)-tetrahydrofuran-2-yl)-3,4-didehydrocefam-4-karboxylathydroklorid eller 4-nitrobensyl(6R,7R)-7-amino-8-oxo-3-[(2S)-tetrahydrofuran-2-yl]-5-tia-1-azabicyklo[4.2.0]okt-2-en-2-karboxylat-hydroklorid