{TAIL ~ The double bond} in {HEAD ~ the olefin} will have migrated one carbon atom to form n pentaldehyde 
{ TAIL ~ The double bond } in { HEAD ~ the olefin } will have migrated one carbon atom to form n pentaldehyde
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH