{TAIL ~ The product} is isolated by {HEAD ~ liquid chromatography} through celite and the solvent removed in vacuo 
{ TAIL ~ The product } is isolated by { HEAD ~ liquid chromatography } through celite and the solvent removed in vacuo
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH