Abstract
Investigation of phenolic patterns from the stems of Dendrobium chrysanthum by HPLC–PDA–MS has led to the isolation of a new phenanthrene derivative with a spirolactone ring, dendrochrysanene ( 1), that proved to suppress the mRNA level of TNF-α, IL8, IL10, and iNOS in murine peritoneal macrophages. The structure of 1 was characterized on the basis of various NMR ( 1H, 13C, 1H– 1H COSY, HMQC, and HMBC), mass spectrometry, and X-ray crystal diffraction data.
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