In the examples, the optical purities of the optically active compounds are determined by comparison of specific rotation with compounds having {TAIL ~ known optical purities} in {HEAD ~ literatures} and by HPLC analysis using an optically active resolution column which is commercially available 
In the examples , the optical purities of the optically active compounds are determined by comparison of specific rotation with compounds having { TAIL ~ known optical purities } in { HEAD ~ literatures } and by HPLC analysis using an optically active resolution column which is commercially available
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH