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