{HEAD ~ The mixture} is then treated with {TAIL ~ an anhydrous tertiary amine base}, such as for example, pyridine, followed by benzoyl chloride to acylate the resulting alcohol 
{ HEAD ~ The mixture } is then treated with { TAIL ~ an anhydrous tertiary amine base } , such as for example , pyridine , followed by benzoyl chloride to acylate the resulting alcohol
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL TAIL 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