PROBLEM TO BE SOLVED: To provide a novel C-glycoside compound which can be applied to cosmetics, medicines and the like having aging inhibitory effect and skin-whitening effect, and an aging inhibitor, an enhancer for the expression of COL4A1, a collagen gene, a skin-whitening agent and a melanogenesis inhibitor comprising the compound.SOLUTION: The present invention provides a novel C-glycoside compound represented by a compound of the following formula, and an aging inhibitor, an enhancer for the expression of COL4A1, a skin-whitening agent and a melanogenesis inhibitor comprising the compound.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】老化抑制効果、美白効果を有する化粧料、医薬等に応用することができる新規なC-配糖体化合物、及び該化合物を含有する老化抑制剤、コラーゲン遺伝子であるCOL4A1発現亢進剤、美白剤並びにメラニン産生抑制剤。【解決手段】下式の化合物を代表例とする新規なC-配糖体化合物、及び該化合物を含有する老化抑制剤、COL4A1発現亢進剤、美白剤並びにメラニン産生抑制剤。【選択図】なし