Filter paper circles, MN 640 d, Qualitative, Slow, (140 s) 7790 28 5 non animal origin N1060102 4 non animal origin Penicillins are a type of β lactam antibiotic consisting of a four membered β lactam ring bound to a five membered thiazolidine ring Retention range: >2 μm Surface weight: 85 g m2
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