The pyrrolidine {HEAD ~ derivative} of {TAIL ~ the above general formula} is synthesized by, for example, a process wherein known 1 benzyl 4 carboxy 2 pyrrolidone is treated with thionyl chloride to form an acid chloride, which is then reacted with Meldrums acid and the resulting product is decarboxylated to obtain 4 acetyl derivative thereof 
The pyrrolidine { HEAD ~ derivative } of { TAIL ~ the above general formula } is synthesized by , for example , a process wherein known 1 benzyl 4 carboxy 2 pyrrolidone is treated with thionyl chloride to form an acid chloride , which is then reacted with Meldrums acid and the resulting product is decarboxylated to obtain 4 acetyl derivative thereof
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH