the percentage of one enantiomer in a mixture of enantiomers.
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Chloromethyl methyl ether
Diethylzinc
Benzaldehyde
(3R) methyl β-hydroxy-β-(p-methoxyphenyl) propionate
(1aS,7S,7aS)-7-hydroxy-7,7a-dihydronaphtho[2,3-b]oxiren-2(1aH)-one