The present invention relates to novel uses of compounds from Antrodia cinnamomea mycelia and mixtures comprising the compounds. The novel uses comprise whitening skin, combating skin ageing, reducing scar formation, inducing or enhancing liver regeneration, or treating fibrosis or a fibrosis-associated disorder in a subject in need thereof. The compounds are preferably selected from 3-isobutyl-4-[4-(3-methyl-2-butenyloxy)phenyl]furan-2,5-dione, 3-isobutyl-4-[4-(3-methyl-2-butenyloxy)phenyl]-1H-pyrrol-2,5-dione, 3-isobutyl-4-[4-(3-methyl-2-butenyloxy)phenyl]-1H-pyrrol-1-ol-2,5-dione, 3R*,4S*-1-hydroxy-3-isobutyl-4-[4-(3-methyl-2-butenyloxy)phenyl]pyrrolidine-2,5-dione, and 3R*,4R*-1-hydroxy-3-isobutyl-4-[4-(3-methyl-2-butenyloxy)phenyl]pyrrolidine-2,5-dione.本發明關於來自牛樟芝菌絲體的化合物及包含該化合物的混合物的新穎用途。該新穎用途包含美白皮膚、對抗皮膚老化、減少疤痕形成、誘發或增強肝臟再生、或在有需要的個體中治療纖維化或與纖維化相關的疾病。該化合物較佳係選自3-異丁基-4-[4-(3-甲基-2-丁烯氧基)苯基]呋喃-2,5-二酮、3-異丁基-4-[4-(3-甲基-2-丁烯氧基)苯基]-1H-吡咯-2,5-二酮、3-異丁基-4-[4-(3-甲基-2-丁烯氧基)苯基]-1H-吡咯-1-醇-2,5-二酮、(3R*,4S*)-1-羥基-3-異丁基-4-[4-(3-甲基-2-丁烯氧基)苯基]吡咯烷-2,5-二酮、或(3R*,4R*)-1-羥基-3-異丁基-4-[4-(3-甲基-2-丁烯氧基)苯基]吡咯烷-2,5-二酮。