A penicillin compound of the formula ##STR1## wherein R is a formyl or acetyl group, and a nontoxic pharmaceutically acceptable salt thereof. The penicillin compound is prepared by (A) reacting a compound of the formula ##STR2## or its salt or its reactive derivative at the carboxyl group, with 6-.alpha.-amino-p-hydroxybenzylpenicillin or its salt or its derivative, or reacting a compound of the formula ##STR3## or its salt or its reactive derivative at the carboxyl group, with 6-aminopenicillanic acid or its salt or its derivative, (B) optionally hydrolyzing or catalytically hydrogenolyzing the reaction product, and (C) optionally converting the reaction product to a nontoxic pharmaceutically acceptable salt. The penicillin compound has low toxicity and superior antibacterial activity especially against bacteria of the genus Pseudomonas and is suitable for parenteral administration, especially for an intramuscular, intravenous or subcutaneous injection.
公式为##STR1##的
青霉素化合物,其中R为甲酰基或乙酰基,以及其无毒的药学上可接受的盐。该
青霉素化合物通过以下步骤制备:(A)将公式为##STR2##的化合物或其盐或其反应衍
生物在羧基处与6-.alpha.-
氨基-p-羟基苯甲基
青霉素或其盐或其衍
生物反应,或将公式为##STR3##的化合物或其盐或其反应衍
生物在羧基处与6-
氨基
青霉素酸或其盐或其衍
生物反应,(B)可选择性地
水解或催化氢解反应产物,以及(C)可选择性地将反应产物转化为无毒的药学上可接受的盐。该
青霉素化合物毒性低,抗菌活性优异,特别是对假单胞菌属细菌具有良好的抗菌活性,适合于肌肉注射、静脉注射或皮下注射等静脉给药。