doi: 10.1021/np980485t.
Oxidized welwitindolinones from terrestrial fischerella spp
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- PMID: 10217710
- DOI: 10.1021/np980485t
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Oxidized welwitindolinones from terrestrial fischerella spp
J Nat Prod.
1999 Apr.
Abstract
3-Hydroxy-N-methylwelwitindolinone C isonitrile (3), 3-hydroxy-N-methylwelwitindolinone C isothiocyanate (4), and the novel cyclic ether N-methylwelwitindolinone D isonitrile (6) are three new alkaloids from two terrestrial Fischerella spp. belonging to the Stigonemataceae. Photooxidation of N-methylwelwitindolinone C isonitrile (1) leads to isonitriles 3 and 6. Isonitrile 3 is readily hydrated to 3-hydroxy-N-methylwelwitindolinone C formamide (5), an artifact produced during the isolation procedure.
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