User:Wickey-nl/mf

http://www.worldofmolecules.com/interactive_molecules/ritalin_3d.htm

http://parazite.nn.fi/rhodium/chemistry/pdf/threo-methylphenidate.pdf
Mahavir Prashad, 2001

http://www.springerlink.com/content/6eb4q2y4wlb088va/fulltext.pdf?page=1
Froimowitz, 2004

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Methylphenidate has four stereoisomers: two threo and two erythro enantiomers.

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