| abstract |
The present invention relates to a compound of formula (I), wherein R1, R2 and R3 are each independently selected from H, OH, F, CI, Br, methoxy and ethoxy; or alternatively, R1 and R2 together form -OCH2O-, R3 is selected from H, OH, methoxy, ethoxy and halogen; R4 is OH or acyloxy; R5 is cycloalkoxyl, amino and substituted amino, and when R5 is selected from amino, at least one of R1, R2 and R3 is not H. The present invention further relates to a method for the synthesis of a compound of formula (I), and the use of the compound of formula (I) in the manufacture of a medicament for the manufacture of torque or treatment of cardiovascular or cerebrovascular diseases. |