| 摘要 |
<p>A compound represented by formula (I),
wherein
R 1 represents a hydrogen atom, etc.,
R 2 and R 3 each independently represents a hydrogen atom, optionally oxidized C1-4 alkyl group or optionally protected hydroxyl group, or R 2 and R 3 taken together represent optionally oxidized C2-5 alkylene group,
R 4 represents an optionally oxidized C1-6 alkyl group, etc.,
R 5 represents an optionally oxidized C1-6 alkyl group, etc.,
R 6 represents an optionally oxidized C1-6 alkyl group, etc.,
m represents 0 or an integer from 1 to 3,
n represents 0 or an integer from 1 to 4, and
i represents 0 or an integer from 1 to 7.</p> |
