These compounds are designated in scheme 3 as having the formula VII A. Example 2 of this application describes the preparation of the S enantiomer by {TAIL ~ the method} shown in {HEAD ~ scheme} 3 
These compounds are designated in scheme 3 as having the formula VII A. Example 2 of this application describes the preparation of the S enantiomer by { TAIL ~ the method } shown in { HEAD ~ scheme } 3
OTH OTH OTH OTH 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 OTH OTH HEAD HEAD HEAD HEAD HEAD OTH