![File:Preparation of gamma and beta lactams.svg](http://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Preparation_of_gamma_and_beta_lactams.svg/512px-Preparation_of_gamma_and_beta_lactams.svg.png)
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current | 15:22, 30 October 2017 | ![]() | 512 × 268 (27 KB) | Hbf878 | Reduced file size. |
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