Scheme 3 illustrates a method of synthesizing the R and S enantiomers of {HEAD ~ the starting materials} of {TAIL ~ the formula} VII wherein X is sulfur 
Scheme 3 illustrates a method of synthesizing the R and S enantiomers of { HEAD ~ the starting materials } of { TAIL ~ the formula } VII wherein X is sulfur
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH