| 摘要 |
Compounds represented by general formula (I), in which R1, R2, R3 each ot her independently selected from H, OH, F, Cl, Br, methoxy and ethoxy; altera tive R1and R2 forms ~OCH2O- together,R3 selected from H, OH, methoxy, ethoxy and halo; R4 selected from OH or acyloxy; R5 selected from cycloalkoxy, ami no, and substituted amino, and when R5 represents amino, R1, R2, R3 don't re present H at same time. A process for preparing compounds represented by gen eral formula (I) and usage thereof for preventing and treating cardiovascula r and cerebrovascular diseases.
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