This product is reacted with 2 2 phenyl acetonitrile to form {TAIL ~ a corresponding tert butoxycarbonyl compound}, which is then reduced with palladium/carbon and debenzylated to form {HEAD ~ 3 ethylpyrrolidine} 
This product is reacted with 2 2 phenyl acetonitrile to form { TAIL ~ a corresponding tert butoxycarbonyl compound } , which is then reduced with palladium / carbon and debenzylated to form { HEAD ~ 3 ethylpyrrolidine }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD