Add the reagents and conditions above and below the arrow that complete this proposed acetoacetic ester synthesis.

If that's not possible, because an acetoacetic ester synthesis will not achieve this transformation efficiently, 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 and below the arrow that have complex hydrocarbon groups in them, there is a set of standard abbreviations you can use.