It is a diastereoisomer of alphacetylmethadol ( as well as levacetylmethadol ).
2.
The approach of the electrophile preferentially occurs from the same side of the medium group ( R M ) rather than the large group ( R L ), mainly producing the shown diastereoisomer.
3.
"' Asymmetric induction "'( also "'enantioinduction "') in stereochemistry describes the preferential formation in a chemical reaction of one enantiomer or diastereoisomer over the other as a result of the influence of a substrate, reagent, catalyst or environment.
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