Conclusion: There is no opticalisomer in alliin samples. its configuration was found to be S-allyl-L-cysteine sulfoxide.
结论：国产蒜氨酸中无手性对映体杂质，其立体构型为S-烯丙基-L-半胱氨酸亚砜。
2
Due to the configuration inversions of chiral carbon in the synthesis of side chain, we synthesized the corresponding opticalisomer of doripenem for quality control.
The raceme, the (R)-isomer and the (S)-isomer are identical in chemical structural formula but different in stereostructure and optical rotation performance.