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ent-Kaurene diterpenoids from Isodon phyllostachys
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文摘
Four new ent-kaurene diterpenoids have been isolated from Isodon phyllostachys. Compound 1 features a novel dihydro-2H-pyran ring motif. Compounds 2 and 3 bear a rare 20-nor-ent-kaurene structure. Compound 4 possesses a rare 7,20-cyclo-ent-kaurene skeleton.

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