{TAIL ~ The monoanionic osmium catalyst} also exhibits {HEAD ~ an increased selectivity} toward the straight chain product 
{ TAIL ~ The monoanionic osmium catalyst } also exhibits { HEAD ~ an increased selectivity } toward the straight chain product
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH