A compound represented by the following formula (I′)
wherein X1 is a methylene group, an ethylene group, a trimethylene group or a vinylene group, X2 is a divalent group represented by the following formula A or B,
Y is an ethylene group or a vinylene group, m and n are each an integer of 0 to 7, which satisfy m+n=0 to 8, R1 and R2 are each independently a hydrogen atom, a methyl group or an ethyl group, provided that when X1 is a methylene group, then X2 is not a divalent group represented by the formula A, and when X1 is a vinylene group, then X2 is not a divalent group represented by the formula A. The compound is a stable capsinoid derivative, and is useful as an active ingredient of an external blood circulation enhancer or a cosmetic composition, a pharmaceutical composition, or a food composition.
以下化合物式(I')所表示的化合物:其中,X1为亚
甲基基团、
乙烯基团、三亚
甲基基团或
乙烯基撑链基团,X2为由以下公式A或B表示的二价基团,Y为
乙烯基团或
乙烯基撑链基团,m和n各为0至7的整数,满足m+n=0至8,R1和R2各独立地为
氢原子、
甲基基团或乙基基团,但当X1为亚
甲基基团时,X2不是由公式A表示的二价基团,当X1为
乙烯基撑链基团时,X2不是由公式A表示的二价基团。该化合物是稳定的
辣椒素衍
生物,可用作外部血液循环增强剂或化妆品组合物、药物组合物或食品组合物的活性成分。