| abstract |
An adamantanetricarboxylic acid derivative is presented by following Formula (1): n n nwherein X is a hydrogen atom or a hydrocarbon group; and R 1 , R 2 and R 3 may be the same as or different from one another and are each a carboxyl group which may be protected by a protecting group, or a carbonyl halide group, wherein at least one of R 1 , R 2 and R 3 is a carboxyl group which is protected by a protecting group, or a carbonyl halide group. |