a functional alkoxy silane as an adhesion promoter, {HEAD ~ which functional alkoxy silane} has {TAIL ~ the formula}: 
has
a functional alkoxy silane as an adhesion promoter , { HEAD ~ which functional alkoxy silane } has { TAIL ~ the formula } :
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH