Abstract

Roots of six Solidago species were examined for their content of acetylenes. The E and Z isomer of dehydromatricaria ester, ( Z, Z)-matricaria ester, ( Z)-dehydromatricaria lactone and a C 16-acetylene were isolated and identified. The Z and E isomer of dehydromatricaria lactone were furthermore produced by oxidation of 2,4-hexadiynyliden-1,6-dioxaspiro-[4.4]nona-2, 8-dien-4-ol with activated MnO 2.

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