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seen framstella cefalexin by omsettning of 7 - acylamino - des - acetoxy - cephalosporanic acid with a fenylglycinderivat in nervaro of enzyme from bacillus megaterium b 400 ferm-p no. 748
seen framstella cefalexin by omsettning of 7 - acylamino - des - acetoxy - cephalosporanic acid with a fenylglycinderivat in nervaro of enzyme from bacillus megaterium b 400 ferm-p no. 748