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To follow up on Eric Ressner’s letter (C&EN, June 6, page 4), IUPAC (per its 1996 report, “Basic Terminology of Stereochemistry”) strongly discourages the use of d- and l- to denote optical rotation of enantiomers and recommends that (+) and (-) be used, respectively. Therefore: (+)-limonene.
By Michael Matson
Houston
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