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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Maleic anhydride and chromone derivatives from the endophytic fungus BCC 54265 (Botryosphaeriaceae)
Masahiko Isaka1, Somporn Palasarn1, Sujinda Sommai1
1a National Center for Genetic Engineering and Biotechnology (BIOTEC) , Klong Luang , Thailand.
Abstract:
A maleic anhydride derivative, botryoanhydride (1), and a chromone derivative, botryochromone (2), together with three known chromones, eugenitin (3), 6-hydroxymethyleugenin (4) and 6-methoxymethyleugenin (5), were isolated from cultures of the endophytic fungus BCC 54265 of the family Botryosphaeriaceae. The structures were elucidated on the basis of NMR, HRMS and CD data. Compound 2 showed weak cytotoxic activity to cancer cell-lines.
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