The method 1 wherein said {TAIL ~ alkanolamine} is selected from {HEAD ~ the group} consisting of ethanolamine and propanolamine 
The method 1 wherein said { TAIL ~ alkanolamine } is selected from { HEAD ~ the group } consisting of ethanolamine and propanolamine
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH