Alternatively, {HEAD ~ the phosphate ester} may be prepared by a reaction of {TAIL ~ the ethoxylated alcohol} with phosphoric anhydride to form a di ester/mono ester mixture 
Alternatively , { HEAD ~ the phosphate ester } may be prepared by a reaction of { TAIL ~ the ethoxylated alcohol } with phosphoric anhydride to form a di ester / mono ester mixture
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH