{HEAD ~ The mixture} is stirred for from {TAIL ~ 6 to 24 hours} at room temperature to complete the reaction 
{ HEAD ~ The mixture } is stirred for from { TAIL ~ 6 to 24 hours } at room temperature to complete the reaction
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH