| abstract |
(57) Abstract: An excellent corneal opacity suppressor is provided. SOLUTION: General formula: [In the formula, R 1 represents hydrogen, R 2 represents a halogen or the like, or R 1 and R 2 represent a bond, and R 3 represents 2-methyl-which may have a substituent. A 1-propenyl group or an isobutyl group, A represents an oxygen atom or NR 8 (in the formula, R 8 represents hydrogen or the like), and R 4 represents hydrogen or the like] A corneal opacity suppressor comprising the fumagillol derivative represented by or a salt thereof. |