Antifeedant triterpenoids from the seeds and bark of Lansium domesticum cv Kokossan (Meliaceae).
نویسندگان
چکیده
Two tetranortriterpenoids, kokosanolide A (1) and C (2) were isolated from the seeds and three onoceranoid-type triterpenoids: kokosanolide B (3), 8,14-secogammacera-7,14-diene-3,21-dione (4) and a 1.5:0.5 mixture of 8,14-secogammacera-7,14(27)-diene-3,21-dione (5) and compound 4 were isolated from the bark of kokossan (Lansium domesticum). Complete 1H- and 13C-NMR data of the triterpenoids 1-5 are reported. The triterpenoids' structures were elucidated primarily by means of high field 1D- and 2D-NMR, IR and HRMS spectral data. Triterpenoids 1-5 exhibited moderate to strong antifeedant activity against the fourth instar larvae of Epilachna vigintioctopunctata.
منابع مشابه
Synonymy in the armoured scale insect genus Unaspis MacGillivray (Hemiptera: Coccomorpha: Diaspididae).
In recent years, an undescribed species of Unaspis MacGillivray (Hemiptera: Coccomorpha: Diaspididae) has become a damaging pest on the fruit crop Lansium domesticum Corrêa (family Meliaceae) in the Philippines.
متن کاملUnaspis lansivora sp. n. (Hemiptera: Diaspididae), a new pest of Lansium domesticum (Meliaceae), and a key to Unaspis species.
Since 2004, an undescribed species of Unaspis (Hemiptera: Diaspididae) has become a damaging pest on Lansium domesticum Corrêa in the Philippines. Its attack on the leaves causes premature senescence and defoliation, resulting in the production of few, underdeveloped, sour fruit and sometimes killing the trees. The scale was misidentified initially as Lepidosaphes ulmi (Linnaeus) and then as Un...
متن کاملDetermination of Free Radical Scavenging, Antioxidative DNA Damage Activities and Phytochemical Components of Active Fractions from Lansium domesticum Corr. Fruit
Lansium domesticum Corr. or "long-kong" is one of the most popular fruits in Thailand. Its peel (skin, SK) and seeds (SD) become waste unless recycled or applied for use. This study was undertaken to determine the bioactivity and phytochemical components of L. domesticum (LD) skin and seed extracts. Following various extraction and fractionation procedures, 12 fractions were obtained. All fract...
متن کامل8,14-Secogammacera-7,14(27)-diene-3,21-dione–8,14-secogammacera-7,14-diene-3,21-dione (1.5/0.5) from the bark of Lansium domesticum Corr.
The components of the title cocrystal, 1.5C(30)H(40)O(2)·0.5C(30)H(40)O(2), each have two tetra-hydro-deca-lin-type fused rings connected through an ethyl-ene fragment [R-CH(2)-CH(2)-R' torsion angles: 158.1 (7) ° in the major component and 157.5 (6)° in the minor component]. The structure is a non-merohedral twin, with a minor twin component of 26%. The exocyclic double-bonded C atom of the ma...
متن کامل14-Hydroxy-8,14-secogammacera-7-ene-3,21-dione from the bark of Lansium domesticum Corr.
In the title compound (kokosanolide B), C(30)H(48)O(3), the hexa-hydro- and octa-hydro-naphthalen-2-one ring systems are connected through an ethyl-ene fragment, with a C-CH(2)-CH(2)-C torsion angle of 176.2 (2)°. The cyclo-hexene ring adopts a half-chair conformation, while the other six-membered rings adopt distorted chair conformations. In the crystal, adjacent mol-ecules are linked into a z...
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ورودعنوان ژورنال:
- Molecules
دوره 16 4 شماره
صفحات -
تاریخ انتشار 2011