This compound was reported as a racemate in a previous study but without relative stereochemistry shown (Lakshmi, V. Raj, K. Kapil, RS. Indian J. Chem., Sect. B: Org. Chem. Incl. Med. Chem. 1998, 37B, 422-424). However, it is now confirmed as a pure enantiomer with specific stereochemistry.