{HEAD ~ The process} 2 wherein {TAIL ~ the hydrocarbyl group} contains from 25 to 250 carbon atoms 
wherein
{ HEAD ~ The process } 2 wherein { TAIL ~ the hydrocarbyl group } contains from 25 to 250 carbon atoms
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH