Arnottin I 2 isolated from Xanthoxylum arnottianum Maxim and of previously unknown structure has been unambiguously synthesized utilizing a 2-methylarenofuran as a masked salicylaldehyde. This is the first occurrence of a 6H-benzo[d]naphtho[1, 2-b]pyran-6-one derivative, the same skeleton as that of gilvocarsin-type antibiotics showing antitumour activity, from a plant source.
H. Ishii, T. Ishikawa, M. Murota, Y. Aoki and T. Harayama, J. Chem. Soc., Perkin Trans. 1, 1993, 1019 DOI: 10.1039/P19930001019
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