PROBLEM TO BE SOLVED: To provide novel diterpene compounds having excellent skin-lightening effects, skin-lightening agents and a method of producing the novel diterpene compounds.SOLUTION: This invention provides diterpene compounds represented by the formula (VIII), or their medically acceptable salts.COPYRIGHT: (C)2014,JPO&INPIT【課題】美白効果に優れる新規ジテルペン化合物、美白剤および新規ジテルペン化合物の製造方法を提供する。【解決手段】下記式(VIII)で示されるジテルペン化合物、またはそれらの医学的に許容可能な塩。【選択図】なし