Two New Bisabolane Sesquiterpenes from Leontopodium longifolium

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Two new bisabolane sesquiterpenes were isolated from the roots of Leontoptdium longifolium. Their structures were elucidated as 4α, 5α-diacetoxy-1α-angeloyloxybisabol-2, 9,11-triene and 4a, 5a-diacetoxy-1α-angeloyloxy-11-hydroxybisabol-2, 9-diene by spectroscopic methods including the 2D NMR techniques.
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