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There is no
 correlation between
 D&L configurations
 and (+)&(-) rotations

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           2-(R) and (S) system
     (Cahn–Ingold–Prelog system)

 R and S came from the Latin words
 Rectus (right) and Sinister (left).
 Example 2-Butanol
 According to this system, 2-butanol
 should have 2 enantiomers
 (R)-2-Butanol
 (S)-2-Butanol.

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