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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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