Karsten Krohn

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Phytochemical investigations of the endophytic fungus of an unidentified Ascomycete, isolated from Meliotus dentatus led to the isolation of two new polyketide metabolites named cis-4-acetoxyoxymellein and 8-deoxy-6-hydroxy-cis-4-acetoxyoxymellein. The structures of the two new polyketides were confirmed on the basis of 1D and 2D NMR techniques. Preliminary(More)
Alpinia purpurata or red ginger was studied for its phytochemical constituents as part of our growing interest on Philippine Zingiberaceae plants that may exhibit antimycobacterial activity. The hexane and dichloromethane subextracts of the leaves were fractionated and purified using silica gel chromatography to afford a mixture of C(28)-C(32) fatty(More)
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