| abstract |
The following general formula (I ') (In the formula, X 1 represents a methylene group, an ethylene group, a trimethylene group or a vinylene group, and X 2 represents the following formula A or B; Y represents an ethylene group or vinylene group, m and n each represents an integer of 0 to 7 satisfying m + n = 0 to 8, and R1 and R2 are each independently Represents a hydrogen atom, a methyl group or an ethyl group. However, when X 1 is a methylene group, X 2 is not a divalent group represented by Formula A, and when X 1 is a vinylene group, X 2 is not a divalent group represented by Formula A. . ), And these compounds are stable capsinoid derivatives, and are useful as active ingredients for external blood circulation promoters or cosmetic compositions, pharmaceutical compositions, and food compositions. |