p-nitrobenzyl 7-phenoxyacetamido-3-exomethylene-cepham-4-carboxylate 、 p-nitrobenzyl(1R,6R,7R)-7-phenoxyacetamido-3-oxo-3-cepham-4-(R/S)-carboxylate-1-oxide 、 7-phenoxy acetamido-3-hydroxy-3-cephem-4-carboxylate-1(R)-oxide(I) acetamido-7-phenoxyacetamido-3-oxo-3-cepham-4-carboxylate-1(R)-oxide 、
7-phenoxyacetamido-3-hydroxy-3-cephem-4-carboxylate 、
异丙醚 、
三氯化磷 生成
para-nitrobenzyl 7-(R)-phenoxyacetamido-3-hydroxy-3-cephem-4-carboxylate