{TAIL ~ The activating reagents} include potassium alkoxides, and chelating {HEAD ~ tertiary diamines} 
{ TAIL ~ The activating reagents } include potassium alkoxides , and chelating { HEAD ~ tertiary diamines }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD