On the existence of "L-threonine formate", "L-alanine lithium chloride" and "bis L-alanine lithium chloride" crystals.

We argue that the recently reported crystals "L-threonine formate" as well as "L-alanine lithium chloride" and "bis L-alanine lithium chloride" actually are the well-known crystals L-threonine and L-alanine, respectively.