The invention is also concerned with {HEAD ~ the novel 4 alkenyl and 2Z alkenyl compounds} and with {TAIL ~ their manufacture} 
The invention is also concerned with { HEAD ~ the novel 4 alkenyl and 2Z alkenyl compounds } and with { TAIL ~ their manufacture }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL