| 摘要 |
This invention relates to methods for the prophylaxis or treatment of diabetic nephropathy comprising, administering as an active ingredient, a compound, or salt thereof, of formula (I)wherein R<1 >stands for H or lower alkyl; R<2 >stands for an optionally esterified carboxyl group; R<3 >stands for a group actually or potentially capable of forming an anion; X shows that the phenylene and phenyl groups bind to each other directly or through a spacer having an atomic chain length of two or less; n stands for 1 or 2; ring A stands for a benzene ring; Y stands for a bond, -O-, -S(O)m- wherein m stands for 0, 1 or 2, or -N(R<4>)- wherein R<4 >stands for H or an optionally substituted alkyl group).
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