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7-Acylamino-3-vinylcephalosporanic acid derivatives and processes for the preparation thereof

  • US 4,409,214 A
  • Filed: 11/10/1980
  • Issued: 10/11/1983
  • Est. Priority Date: 11/19/1979
  • Status: Expired due to Term
First Claim
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1. A compound of the formula:

  • ##STR26## in which R1 is 2-aminothiazol-4-yl or 2-acylaminothiazol-4-yl,R2 is carboxy or a protected carboxy group, andR4 is lower alkyl substituted by carboxy or a protected carboxy group,and a pharmaceutically acceptable salt thereof.

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