abstract |
wherein R1 denotes a linear or branched alkyl group with 6 to 20 carbon atoms, each of R4 and R5 independently denotes a methyl or ethyl group, R6 denotes a hydrophilic group, R7 denotes a hydrogen atom or a methyl group, Y1 denotes a single bond, —S—, —S(═O)—, —C(═O)—O— or —O—, Z denotes a cyano group or a hydroxy group, each of p1 and q denotes an average number of repetitions, and is a number of from 1 to 50, and m denotes a number of from 1 to 5. |