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