Add the reagents and conditions above and below the arrow that complete this proposed malonic ester synthesis. If that's not possible, because a malonic ester synthesis will not achieve this transformation, then check the box below the drawing area instead. Note: if you need to use alkyl halide reagents, please use only alkyl bromides. If you need to write reagents above or below the arrow that have complex hydrocarbon groups, there is a set of standard abbreviations you can use.Can't be done with a malonic ester synthesis.