The reaction time required may depend upon {HEAD ~ various factors} including {TAIL ~ the mole ratio} of compounds and and the nature of organic groups R2 and R3 and may generally be in the range of 5 30 minutes 
including
The reaction time required may depend upon { HEAD ~ various factors } including { TAIL ~ the mole ratio } of compounds and and the nature of organic groups R2 and R3 and may generally be in the range of 5 30 minutes
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH