Component 2 is utilized at amounts effective to enhance {HEAD ~ the effect} of {TAIL ~ Component} 1 
of
Component 2 is utilized at amounts effective to enhance { HEAD ~ the effect } of { TAIL ~ Component } 1
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH