Two new lignan derivatives (1 and 2), along with the known scopoletin (3), methyl caffeate (4), falcarindiol (5), 3,5-dicaffeoylquinic acid, 3,5-dicaffeoylquinic methyl ester, chlorogenic acid, p-hydroxyphenylethyl-trans-ferulate, and vanillin, were isolated from extracts of the roots of Chaerophyllum hirsutum. Structure elucidation of the new compounds was carried out by 1D and 2D NMR experiments and by HRMS analysis. Several of the isolated compounds were tested for their cytotoxic activity against the HL-60, HT-1080, LoVo, and LoVo/Doxo cell lines.

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