The invention provides an antiobesity agent advantaged by no worry of side effect, safety and excellent fat accumulation inhibiting effect, and provides pharmaceuticals, food, or cosmetics advantaged by no worry of side effect, safety and excellent fat accumulation inhibiting effect. The invention concretely comprises: an antiobesity agent comprising Rhinacanthus nasutus D represented by the following formula (1), an antiobesity agent comprising a novel compound A represented by the following formula (2), and pharmaceuticals, food, or cosmetics comprising the antiobesity agents and provided with fat accumulation inhibiting effect.本發明的課題為提供一種無副作用之虞、安全且具有優異的脂肪堆積抑制作用的抗肥胖劑。提供一種無副作用之虞、安全且具有優異的脂肪堆積抑制作用的醫藥品、食品或化妝料。本發明的解決手段如下：一種由下列的式(2)表示的新穎化合物之用途，係用於製備抗肥胖劑，一種由下列的式(2)表示的新穎化合物之用途，係用於製備具有脂肪堆積抑制作用的抗肥胖劑，[化學式]一種上述之新穎化合物之用途，係用於製備具有脂肪堆積抑制作用的醫藥品、食品或化妝料。
