The Michael addition is a chemical reaction that involves the addition of a nucleophile (such as an enolate or enamine) to an α,β-unsaturated carbonyl compound (like an aldehyde or a ketone). "Stereoselective" means that the reaction is selective in forming one particular stereoisomer (a specific three-dimensional arrangement of atoms) over others.
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(2S,3R)-3-(4-fluorophenyl)-2-ethyl-4-nitrobutanal
