Short reportChromenes from Ageratina arsenii and revised structures of two epimeric chromene dimers
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Cited by (15)
Chromenes from leaves of Calea pinnatifida and evaluation of their leishmanicidal activity
2015, Revista Brasileira de FarmacognosiaCitation Excerpt :The 1D and 2D-NMR spectral data of these compounds are consistent with those of a chromene skeleton. Thus, compounds 1, 2, 3 and 4 were identified as 6-acetyl-7-hydroxy-2,2-dimethylchromene (eupatoriochromene) (Harel et al., 2011), 6-acetyl-7-methoxy-2,2-dimethylchromene (methyleupatoriochromene) (Zhai et al., 2010), 6-(1-hydroxyethyl)-7-methoxy-2,2-dimethylchromene (encecalinol) (Fang et al., 1988) and 6-(1-ethoxyethyl)-7-methoxy-2,2-dimethylchromene (ethyl encecalol) (Steelink and Marshall, 1979), respectively. There are no spectroscopic or optical evidences to define the absolute stereochemistry of C-11 from compounds 3 and 4.
An investigation of bioactive phytochemicals in the leaves of Melicope vitiflora by electrospray ionisation ion trap mass spectrometry
2009, Analytica Chimica ActaCitation Excerpt :The molecular mass is 30u less than the molecular mass of evodionolmethylether (8) which could suggest it has a methoxyl group less. A compound with one less methoxyl group than evodionolmethylether (8) was found to be encecalin (10) from the Encelia species [16]. A loss of 18u is also seen for this compound which cannot be accounted for.
Chemistry of the Oxylobinae
2003, Biochemical Systematics and EcologyBenzopyran dimers from Melicope ptelefolia
1998, PhytochemistryChromenes from Ageratum conyzoides
1991, Phytochemistry
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Permanent address: Hubei College of Chinese Traditional Medicine, Wahan, China.
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Permanent address: Wuhan Institute of Medical Sciences, Wuhan, China.