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Penicillin G:benzylpenicillin Penicillin V:phenoxymethypenicillin Strain: Penicillium notatum (1940s) Penicillium chrysogenum 6-APA Penicillin G: benzylpenicillin Penicillin V: phenoxymethypenicillin Strain: Penicillium notatum (1940s) Penicillium chrysogenum 6-APA