| 摘要 |
The invention concerns novel compounds of general formula (I) in which: R1 represents one (1,4-benzodioxan-2-yl) group, one (2-methyl- 1,4-benzodioxan-2-yl)methyl group, one (2,3-dihydrobenzofuran-2-yl)methyl group, one (benzofuran-2-yl)methyl group, one [(2H)-benzopyran-3-yl]methyl (C) group, one (3,4-dihydro-(2H)- benzopyran-3-yl)methyl or one (3,4-dihydro-(2H)-1-benzopyran-3-yl)methyl group. R2, R3 and R4 independently represent either one hydrogen atom, one C1-4 alkyl chain, one aryl core, heteroaryl, one aralkyl group, or naphtyl, optionally substituted or one aroyl group, and their salts.
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