| abstract |
To provide a novel colitis ameliorating agent. n A colitis ameliorating agent comprising a trans-astaxanthin derivative of formula (I), geometric isomers thereof, a mixture of the geometric isomers, an optical isomer thereof, or a salt thereof; n n n n n n n n n n n n (wherein m 1 , m 2 , n 1 , and n 2 are each the same or different and mean an integer of 1 to 6). |