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