We are told that L-Glucose is an enantiomer of D-Glucose, which would mean that they are mirror images of each other. But then we're also told that the L and D forms is determined by the spacial relationship to glyceraldehyde. enter image description here

Which of the structure is correct? Are they the same?

  • 2
    $\begingroup$ Strictly on the left there is not a projection. It is a projection like every other structural formula $\endgroup$
    – Alchimista
    Commented Jan 5, 2020 at 8:47

1 Answer 1


It looks to me like the left one is just wrong. It looks like who made the image took D-glucose and just flipped the 5-OH.

The result? The molecule at left is not glucose, but L-Idose!


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