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                      Meldrum's acid
                      2,2-Dimethyl-1,3-dioxane-4,6-d
                      Mono-4-nitrobenzyl malonate
                      Side chain for meropenem
                      P-Nitrobenzyl 2-Diazoacetoacet
                      Meropenem
                      4-nitrobenzyl (5R,6S)-6-[(1R)-...
                      3-(2-Bromo-1-oxopropyl)-spiro[...
                      Magnesium mono-p-nitrobenzyl m
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