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Prinsep MR , Patterson GML , Larsen LK , Smith CD
Tolyporphins J and K, two further porphinoid metabolites from the cyanobacterium Tolypothrix nodosa
Journal of Natural Products. 1998 Sep;61(9) :1133-1136
PMID: ISI:000076194400015   
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Abstract
Two new porphinoids, tolyporphins J (1) and K (2), have been isolated from the terrestrial cyanobacterium, Tolypothrix nodosa (HT-58-2) and identified by NMR and mass spectral analysis. The activities of tolyporphins J and K in cell sensitization and drug accumulation assays for multidrug resistance (MDR) reversal were compared with those of tolyporphin A. Unusual NMR spectroscopic shifts were observed for tolyporphin J (1) in CDCl3.
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Times Cited: 2 English Article 124QY J NAT PROD