{TAIL ~ Reaction temperature} is usually 0° to 100° C., preferably 20° to {HEAD ~ 80° C} 
{ TAIL ~ Reaction temperature } is usually 0 ° to 100 ° C. , preferably 20 ° to { HEAD ~ 80 ° C }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD