The method 2 wherein said {HEAD ~ quaternary ammonium salt} comprises {TAIL ~ an alkyl dimethyl benzyl ammonium chloride} 
comprises
The method 2 wherein said { HEAD ~ quaternary ammonium salt } comprises { TAIL ~ an alkyl dimethyl benzyl ammonium chloride }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL