Four tuber-forming substances in Jerusalem artichoke were isolated from the leaves. The structures were established by spectroscopic methods as jasmonic acid (2), methyl β-D-glucopyranosyl tuberonate (3), and two new polyacetylene compounds, methyl β-D-glucopyranosyl helianthenate A (4, C19H24O8) and B (5, C17H22O8).
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Matsuura et al. (1993) studied this question.
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