From the heartwood of Lindera glauca Blume three new diarylpropanoids have been isolated and identifi ed, which were named lindeglaucol, lindeglaucone, and lindeglaucoside A. Chipped heartwood was extracted repeatedly with 80 % aqueous methanol (MeOH) at room temperature, and the concentrated methanolic extract was successively partitioned with ethyl acetate (EtOAc), n -butanol, and H 2 O. From the EtOAc fraction, three new diarylpropanoids and a known chalconoid were isolated through repeated column chromatography with silica gel, octadecyl silica gel, and Sephadex LH-20. The chemical structures of the compounds were elucidated by interpretation of extensive spectroscopic data such as nuclear magnetic resonance, fast atom bombardment mass spectroscopy, and infrared. In addition, a known chalconoid, cilicicone B, was isolated for the fi rst time from the heartwood of L. glauca .

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Green apple is important not only for its high antioxidant contents, but also for its acceptance among the general consumer. The aim of this study is to confirm the effect of green apple extracts on skin pores contraction through antioxidant activity, quantification of tannin contents, protein aggregation assay and inhibition of 5‐alpha‐reductase type 1 mRNA expression. First, Green apple was separated to whole apple, apple rind, pulp, seed and each group was extracted with 70% ethanol. Apple rind exhibited significantly higher antioxidant activity, tannin contents. So, apple rind was fractionated with hexane, CHCl3, EtOAc, BuOH and water to get active fraction. Among these solvent fractions, green apple rind ethyl acetate (AR‐E) has a greatest antioxidant activity and tannin content. Also, protein aggregation of green apple fraction has an effect as compared with positive control tannic acid. The major factor contributing to excess sebum is 5‐alpha reductase type1 which related to enlarge skin pores. We confirmed that green apple fraction reduced 5‐alpha reductase type1 expression in HaCaT using RT‐PCR method. In conclusion, we expected the beneficial effect of green apple on skin pores contractionGrant Funding Source : Ipeeres Ltd.