Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamanouchi Pharmaceutical Co Ltd
Original Assignee
Yamanouchi Pharmaceutical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamanouchi Pharmaceutical Co LtdfiledCriticalYamanouchi Pharmaceutical Co Ltd
Priority to JP12360176ApriorityCriticalpatent/JPS5350192A/en
Priority to US05/806,932prioritypatent/US4165429A/en
Priority to FR7718592Aprioritypatent/FR2356655A1/en
Priority to DE19772727686prioritypatent/DE2727686A1/en
Priority to DK284777Aprioritypatent/DK284777A/en
Priority to SE7707366Aprioritypatent/SE7707366L/en
Publication of JPS5350192ApublicationCriticalpatent/JPS5350192A/en
PURPOSE: Cephalosporin derivatives of formual I [X is H or methoxy; A is II, III, IV or V (R1 is lower alkyl; R2 is O or S); B is (lower alkyl-substituted) 1, 3, 4-thiadiazolyl or tetrazolyl] and their salt, e.g. 7-(3-methylsulfonyl-1, 2, 4triazol-1-yl) acetamido-3-(1-methyltetrazol-5-yl) thiomethyl-▵3-cephem-4-carboxylic acid.