Approach for finding a meso compound.

meaning of epimers.

A meso compound is "superposable" on its mirror image (not to be confused with superimposable, as any two objects can be superimposed over one another regardless of whether they are the same. If two objects can be superposed, all aspects of the objects coincide) and it does not produce a "(+)" or "(-)" reading when analyzed with a polarimeter.

Epimers are diastereomers that contain more than one chiral center but differ from each other in the absolute configuration at only one chiral centre.