| abstract |
4'-Nitrobenzyl-7-phenoxyacetamide-3-hydroxy-3-cephem-4-carboxylate solvates are described, of the following formulan wherein n is 1 or 0; and X is CH,COOH, CH 3 CH 2 COOH or CH,OH when n is 1, and X is CH 3 COOH, CH,CH 2 COOH or 1/2 CH 2 Cl 2 when n is O. n The solvates are prepared by contacting 4'-nitrobenzyl 7-phenoxyacetamido-3-hydroxy-3-cephem carboxylate sulphide or sulphoxide with acetic or propionic acid or methylene chloride |