| 摘要 |
The present invention relates to derivatives of pyridazine of formula: <IMAGE> (I) in which R1 is alkyl or a phenyl group and R2 is H or R1 and R2 form, with the carbon atoms to which they are attached, a benzene cycle, R3 is H or phenyl and R4 is <IMAGE> in which R5 is H or CH3 and R6 is H, OH, OR or OCOR; it also relates to a process for preparing the products of formula (I) and to the drugs containing at least one of said products.
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