| 摘要 |
A hydrogel forming agent comprising a substituted aromatic compound represented by general formula (I) [wherein R is a hydrogen atom or an alkyl; X is an oxygen or sulfur atom; Y1, Y2, and Y3 each is an aryl substituted by a hydrophilic group; L1 is a single bond, an oxygen atom, methyleneoxy, an aryleneoxy, or a -[CH2-(O)r1-Z1]s1- group; L2 is a single bond, an oxygen atom, methyleneoxy, an aryleneoxy, or a -[CH2-(O)r2-Z2]s2- group; L3 is a single bond, an oxygen atom, methyleneoxy, an aryleneoxy, or a -[CH2-(O)r3-Z3]s3- group; Z1, Z2, and Z3 each is an arylene; r1, r2, and r3 each is 0 or 1; and s1, s2, and s3 each is 0 or 1]. |
