Patent ID: 8143413

Claim:
A compound represented by the general formula (2) below: wherein R 3 is an aliphatic hydrocarbon group having 10 to 22 carbon atoms; R 4 is an aliphatic hydrocarbon group having 10 to 22 carbon atoms; Y 3 is a methylene group or a carbonyl group; Y 4 is a methylene group or a carbonyl group; X 1 and X 2 , which are different from each other, are a hydrogen atom or a group represented by —(CH 2 ) 3 —NHC(═NH)NH 2 ; T 1 is a group represented by the general formula (T2) or the general formula (T3) below: wherein X 3 and X 4 , which are different from each other, are a hydrogen atom or a carboxyl group; and n is an integer selected from 4 to 12.