The intermediate molecular weight compounds are useful as detergent intermediates, and {HEAD ~ the lower molecular weight compounds} are {TAIL ~ useful intermediates} in the preparation of agricultural and medicinal compounds 
are
The intermediate molecular weight compounds are useful as detergent intermediates , and { HEAD ~ the lower molecular weight compounds } are { TAIL ~ useful intermediates } in the preparation of agricultural and medicinal compounds
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH