Provided are anti-wrinkle agents having a novel parent nucleus that are suitable as components for external skin preparations such as cosmetics. The anti-wrinkle agents comprise compounds represented by general formula (1), stereoisomers thereof, or pharmacologically permissible salts thereof. Said anti-wrinkle agents have excellent efficacy in improving wrinkles and sagging that occur as a result of photoaging due to ultraviolet ray exposure that is skin aging with increased age. [In the formula, R
