| 摘要 |
The present invention relates, by way of novel industrial products, to the benzopyranone-.beta.-D-thioxyloside compounds of the formula (see formula I) in which: - one of the substituents R or R' is an oxygen atom double-bonded to the corresponding cyclic carbon atom and the other is a group R1, - the symbol ~~~ represents a double bond conjugated to the CO group provided by one of the substituents R or R', - X is a sulfur atom or an oxygen atom, - R1 and R2, which are identical or different, are each a hydrogen atom, a C1-C4 alkyl group, a halogen atom, a trifluoromethyl group or a phenyl group, it being possible for R1 and R2, taken together, to form a 7,8,9,10-tetrahydrodibenzo¢b,d!pyran-6-one group or a 1,2,3,4-tetrahydro-9H-xanthen-9-one group with the benzopyranone group to which they are bonded, and - Y is the hydrogen atom or an aliphatic acyl group. These compounds are useful in therapy, especially as venous antithrombotics.
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