- Malonic esters
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A compound of the formula I: STR1 wherein: R is substituted or unsubstituted C1-6 alkyl, a substituted or unsubstituted aromatic ring, a heterocyclic ring, a cycloalkyl group or a fused ring system, R1 is hydrogen, lower alkyl, cycloaliphatic or heterocyclic ring, and X is a halogen atom.
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