{TAIL ~ Combinations} of {HEAD ~ the above chain transfer agent}, initiator and reaction promoter are not particularly limited and can be selected as appropriate from among the various examples above 
{ TAIL ~ Combinations } of { HEAD ~ the above chain transfer agent } , initiator and reaction promoter are not particularly limited and can be selected as appropriate from among the various examples above
TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH