More preferably, the compound having active hydrogen is one which contains in the molecule thereof {HEAD ~ both} of {TAIL ~ an acid group} and a functional group having active hydrogen 
of
More preferably , the compound having active hydrogen is one which contains in the molecule thereof { HEAD ~ both } of { TAIL ~ an acid group } and a functional group having active hydrogen
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH