The R enantiomer may be prepared in an analogous fashion by replacing the S enantiomer of {HEAD ~ the compound} of formula {TAIL ~ IX} depicted in scheme 3 and referred to in Example 3A with the corresponding R enantiomer  
The R enantiomer may be prepared in an analogous fashion by replacing the S enantiomer of { HEAD ~ the compound } of formula { TAIL ~ IX } depicted in scheme 3 and referred to in Example 3A with the corresponding R enantiomer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH