The base can be, for example, pyridine, {HEAD ~ dimethylaminopyridine}, quinoline, trialkylamines, and {TAIL ~ mixtures} thereof 
The base can be , for example , pyridine , { HEAD ~ dimethylaminopyridine } , quinoline , trialkylamines , and { TAIL ~ mixtures } thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH