| abstract |
(57) [Problem] To provide an immunosuppressant. SOLUTION: Formula (I): [R 1 and R 2, OH, amino group, phosphoric acid group, and alkyl group having a C number of 1 to 20 which may have been substituted with selected groups of one or more from the group consisting of a sulfonic acid group, wherein R 3 -CO An acyl group represented by-(R 3 is an alkyl group having 1 to 4 carbon atoms), formula (a): R 4 is H or an alkyl group having 1 to 4 carbon atoms, or OH, Carboxyl group, carbamoyl group, mercapto group, methylthio group, amino group, guanidino group, imidazolyl group, X is a C1-C4 alkyl group substituted by one group selected from the group consisting of a phenyl group, a hydroxyphenyl group, and an indolyl group; X is a formyl group or a hydroxymethyl group; ): Embedded image And n is 0 or an integer of 1 or more] Or a cyclic body thereof, or a salt thereof. |