Abstract
Two new isocoumarin glucosides, haworforbins A (1) and B (2), and a new chromone, haworforbin C (3), have been isolated from Haworthia cymbiformis. Their structures and absolute configurations were elucidated on the basis of NMR and CD data. Haworforbin C (3) exhibited moderate inhibition of nitric oxide production in lipopolysaccharide-stimulated RAW264.7 cell line.
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Acknowledgments
This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan and a grant from The Open Research Center Project in Hoshi University.
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Yamasaki, F., Machida, S., Nakata, A. et al. Haworforbins A–C, new phenolics from Haworthia cymbiformis . J Nat Med 67, 212–216 (2013). https://doi.org/10.1007/s11418-012-0647-x
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DOI: https://doi.org/10.1007/s11418-012-0647-x