111390-00-2
(6R,7R)-Trimethylsilyl 7-[((Trimethylsilyl)oxy)carbonyl]-amino-3-acetoxymethylceph-3-em-4-carboxylate
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111389-99-2
(6R,7R)-Trimethylsilyl 7-[((Trimethylsilyl)oxy)carbonyl]-amino-3-iodomethylceph-3-em-4-carboxylate