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