| 摘要 |
The diene derivs. of formula (I) are prepared by reacting the reactive deriv. of carboxylic acid of formula (II) with the amine deriv. of formula (III) and reducing the amido derivs of the product. In formulas, R1, R2, R3 and R4 are each H, hydroxyl or lower alkyl; X is H or halogen. The diene derivs. of formula (I) are useful as vasodilators.
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