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Chemical and Pharmaceutical Bulletin
Vol. 38 (1990) No. 8 P 2102-2107



Bisosthenon (1), a new dimeric coumarin, was isolated from the roots of some Citrus plants (Rutaceae), and the structure was elucidated to be 1, correspoding to a head-to-head dimer of osthenon (4), which was previously obtained from Citrus plants. The photodimerization of 4 gave 1 as well as two other dimeric products, 2 and 3.

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