Biological Source
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Isol. from Indisia bijuga, Soymida febrifuga, Rhododendron spp., flowers of Eugenia jambolana, Leptarrhena pyrofolia, Mahonia siamensis, Rhamnus pallasii, Cedrus deodara, Heuchera villosa,
Adenanthera, Ampelopsis, Cercidiphyllum and Pinus spp.
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