| 摘要 |
Ethers of thienamycin of the formula <IMAGE> and their non-toxic, pharmaceutically acceptable salts, in which R<4> denotes an ether radical, and salts of these compounds are prepared. The said ethers are obtained from thienamycin, in which the acid group and the amino group are protected, by appropriate etherification. The protective groups are then removed. The ethers obtained can be used as antibiotics.
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