The process 1, wherein {HEAD ~ the first stage} is undertaken with {TAIL ~ equimolar quantities} of potassium xanthate and the sodium salt of 2 bromopropionic acid 
is undertaken with
The process 1 , wherein { HEAD ~ the first stage } is undertaken with { TAIL ~ equimolar quantities } of potassium xanthate and the sodium salt of 2 bromopropionic acid
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH