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Triangeliphthalides A-D (1-4), four novel phthalide trimers with two new linkage styles, were isolated from Angelica sinensis, together with two related phthalide dimers (5-6). Their structures including absolute configurations were determined. The production mechanism of phthalide polymers was proposed, and their bioactivities were also evaluated.
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Zou et al. (2019) studied this question.
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