| 摘要 |
6-Aminopenicillanic acids of the formula IN WHICH R1 is H, alkyl of one to four carbon atoms, or COOR5, and R2 and R5 each are H or alkyl of one to four carbon atoms, and R3 and R4 each are H, alkyl or alkoxy of respectively one to four carbon atoms, OH, F, Cl, Br, I, CF3, NO2 or NH2, including the physiologically acceptable salts thereof, possess the antibiotic activity of conventional penicillins, e.g., against penicillin sensitive microorganism, e.g., S. aureus, S. pyogenes, Pasteurella cuniculicida and E. coli, and possess substantially higher acid stability.
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