File talk:Thalidomide-structures.png
This image needs a legend to differentiate which isomer is each one. The thalidomide page that includes this image says in the figure legend:
Left: (R)-thalidomide Right: (S)-thalidomide
But I find that is opposite to what this image shows.
It is true that in the former version, 26 Sept. 2006 by Benjah-bmm27, the drawn formulas do not match the ball-and-stick models. This is corrected in the current version of this image (17 June 2007 by Eugene Zelenko).
However, the ball-and-stick models shown in both versions are left (S), right (R):
Hierarchy of substituents:
1- nitrogen
2- carbonyl C
3- aliphatic C
4- hydrogen
left structure: seen from below, N > CO > C counterclockwise, hence it is (S)
right structure: seen from above, N > CO > C clockwise, hence it is (R)
I am going to edit the thalidomide page and correct the figure legend.