The capping agent may be {HEAD ~ any} of methoxypolyoxyethylene monols, polyoxyethylene polyoxypropylene monols, and {TAIL ~ mixtures} thereof 
The capping agent may be { HEAD ~ any } of methoxypolyoxyethylene monols , polyoxyethylene polyoxypropylene monols , and { TAIL ~ mixtures } thereof
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH