香树脂
1.Any of various oily resins derived from certain tropical trees, especially Canarium luzonicum of the Philippines, and used in making varnishes and inks.
2.in the concentration of lOOOmg/L, it had 35.2% protction effect to the Pseudoperonospora cubensis(Berk et Curt.) Rostov in vivo test.
3.For the exploration of the active principles,the chemical com-ponents of Viscum coloratum(Komar.) Nakai were studied. According to chemi-cal analysis and spectroscopic data,the chemical structures of the compoundsisolated from the acetone eluate of the ethanol extract were identified as β-acet-ylamyrin(Ⅰ),β-amyrin(Ⅱ),lupeol(Ⅲ),oleanolic acid(Ⅳ),β-sitosterol(Ⅴ),betulinic acid(Ⅵ)and daucosterol(Ⅶ).
4.Four compounds have been reported from the species：β-sitosterol(Sub 1), stearic acid(Sub 7), palmitic acid(Sub 11) and α-amyrin acetate(Sub 15).
5.Results Seven triterpenoids were isolated and identified as: lupeol (Ⅰ), α-amyrin 3-undecanotate (Ⅱ), lupeol acetate (Ⅲ), lupeol 3-palmitate (Ⅳ), melastomic acid (Ⅴ), β-amyrin acetate (Ⅵ), betulinic acid (Ⅶ), respectively. Conclusion Among those compounds, compound Ⅱ is a new one, while compounds Ⅳ-Ⅵ are isolated from the plants of Clerodendrum Linn.
6.Crystals Ⅰ～Ⅳ were isolated from the ethereal extracts of Poria cocos and identified respectively as O-acetyl-pachymic acid (Ⅰ), 3β-hydroxy-lanosta-7,9 (11), 24-trien-21-oic acid (Ⅱ), β-amyrin acetate (Ⅲ) and 3β-hydroxy-16α-acetoxy-lanosta-7,9 (11), 24-trien-21-oic acid (Ⅳ).
8.A semi-transparent redish brown resin extracted from Benzoin trees. Used mostly as a stablizing agent. Origin: Sumatra.
9.any of various hard resins from trees of the family Dipterocarpaceae and of the genus Agathis; especially the amboyna pine.
10.Any of three colorless isomeric liquid hydrocarbons, C10H14, obtained chiefly from the essential oils of cumin and thyme and used in the manufacture of synthetic resins.
