The CO and H2 are reacted under {TAIL ~ high pressures} to produce {HEAD ~ methanol} 
The CO and H2 are reacted under { TAIL ~ high pressures } to produce { HEAD ~ methanol }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD