Abstract
Tithoniamarin (1), a new isocoumarin dimer and a new ceramide, named tithoniamide (2a), have been isolated from Tithonia diversifolia, in addition to the known beta-sitosterol and beta-sitosterol glucopyranoside. The structures were elucidated on the basis of spectroscopic and chemical evidence. Preliminary studies showed that 1 has antifungal and herbicidal activities against Microbotryum violaceum and Chlorella fusca.
MeSH terms
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Asteraceae / chemistry*
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Ceramides / chemistry
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Ceramides / isolation & purification*
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Ceramides / pharmacology
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Flowers / chemistry
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Isocoumarins / chemistry
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Isocoumarins / isolation & purification*
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Isocoumarins / pharmacology
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Microbial Sensitivity Tests
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Nuclear Magnetic Resonance, Biomolecular
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Optical Rotation
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Spectrometry, Mass, Electrospray Ionization
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Spectrophotometry, Infrared
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Spectrophotometry, Ultraviolet