Anavex Life Sciences Corp (AVXL)

[Bourbon_on_my_cornflakes]

In chemistry, an enantiomer – also called optical isomer, antipode, or optical antipode – is one of two stereoisomers that are non-superposable onto their own mirror image. Enantiomers are much like one's right and left hands, when looking at the same face, they cannot be superposed onto each other. Wikipedia

I think the point is the -A273 enantiomer is significantly more effective than the +A273 enantiomer in doing the wonderful effects that 273 has on sigma receptors. So by purifiying it to only be -A273, the performance would be enhanced to highly statistically significant levels