Figure 1.
Molecular structures and numbering schemes for (a) the S enantiomer of Lev (chiral carbon C6) and (b) the R enantiomer present in the racemic compound Eti (chiral carbon C5) taken from reference structures deposited with the CSD (OMIVUB27 and OFIQUR26). It is not ideal that the numbering schemes are different in both compounds; however, to be consistent with the references we are following the CSD numbering schemes.