| 摘要 |
FIELD: medicine. SUBSTANCE: claimed invention describes new cephem compounds of formula:where Ris amino group of protected amino group; Ris hydrogen, lower alkyl or hydroxy protected group: Ris carboxy or protected carboxy; Ris 3-pyridyl, 4-pyridyl or optionally substituted heteromonocyclic group which contains as heteroatoms two nitrogen atoms and which may also contain and one oxygen or sulfur atom, and n is 0.1 or 2, provided that if Ris lower alkyl, them n is 1 or 2, and Ris optionally substituted heteromonocyclic group which contains as heteroatoms two nitrogen atoms and which may also contain one oxygen or sulfur atom, and pharmaceutically acceptable salts which are useful as drugs. EFFECT: improved properties of the title compounds. 15 cl, 3 ex |
