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