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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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