| 摘要 |
A compound of formula (I): <IMG> wherein R1 is selected from the group consisting of H, .alpha.-L-Rhamnopyranose, .alpha.-D- Mannopyranose, .beta.-D-Xylopyranose, .beta.-D-Glucopyranose, and .alpha.-D- Arabinopyranose; R2 is selected from CH3, COOH, CH2OH, COOCH3 and CH2O-.alpha.-D-Arabinopyranose; with the proviso that the compound of formul a (I) is not a compound of formula (I) wherein R1 is .beta.-D-Glucopyranose an d R2 is COOH; wherein R1 is .alpha.-L-Rhamnopyranose and R2 is CH3; wherein R1 is .beta.-D-Glucopyranose and R2 is CH2OH; wherein R1 is .beta.-D-Xylopyrano se and R2 is CH2OH; wherein R1 is .alpha.-L-Rhamnopyranose and R2 is COOCH3, wherein R1 is H and R2 is CH3; wherein R1 is H and R2 is CH2OH; wherein R1 is H and R2 is COOH; or wherein R1 is H and R2 is COOCH3, or a pharmaceutically acceptable salt thereof.
|
