There are provided compounds represented by the following general formula (I):
[where R
1
is 5-methylpyridin-2-yl, p-tolyl or mesityl, R
2
is one of the following general formulas (II)-(IX):
(where R
3
is C1-C4 alkyl, R
4
is H or C1-C4 alkyl, R
5
is H, 3-pyridylmethyl or 4-pyridylmethyl, and R
6
is 2,4-dihydroxybenzyl, 3-pyridylmethyl or 4-pyridylmethyl), or when R
1
is mesityl, R
2
is the following formula (X)],
and pharmaceutically acceptable salts thereof. The compounds exhibit pruritus-inhibiting action, and are useful for prevention or treatment of itching and pruritus caused by reaction against insect-inflicted wounds, reaction against environmental allergens, skin infections or external parasite infections, or caused to renal dialysis patient.
提供了以下通式(I)所代表的化合物:[其中R1为5-
甲基吡啶-2-基、对甲基苯基或二甲基苯基,R2为以下通式(II)-(IX)之一:(其中R3为C1-C4烷基,R4为H或C1-C4烷基,R5为H、3-
吡啶甲基或4-
吡啶甲基,R6为2,4-二羟基苯甲基、3-
吡啶甲基或4-
吡啶甲基),或当R1为二甲基苯基时,R2为以下通式(X)],以及其药学上可接受的盐。这些化合物具有抑制瘙痒作用,可用于预防或治疗由对昆虫造成的伤口反应、对环境过敏原的反应、皮肤感染或外部寄生虫感染引起的瘙痒和瘙痒,或透析患者引起的瘙痒。