| 摘要 |
A potassium channel opener which contains as the active ingredient a compound (e.g., pimaric acid) represented by the formula (I): (I) wherein R<1> to R<7> each represents alkyl, alkenyl, halogeno, hydroxy, haloalkyl, hydroxyalkyl, aminoalkyl, alkoxy, aryl, acyl, carboxyl, alkoxycarbonyl, a hydroxamate group, sulfo, carbamoyl, or a sulfonamide, aldehyde, or nitrile group, provided that R<4> and R<6> may be bonded to R<5> and R<7>, respectively, to form a ring; and the three bonds each indicated by <u>----</u> each is a single bond or one of these is a double bond and the others are single bonds.
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