Four new sesquiterpene derivatives from Dendrobium findlayanum

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Three new sesquiterpene glycosides with alloaromadendrane and ylangene-derived type aglycones,named dendrofindlayanosides A-C (1-3),one new cyclopacamphane type sesquiterpene named dendrofindlayanobilin A (4),together with five known compounds have been isolated from stems of Dendrobiumfindlayanum.Their structures were determined on the basis of spectroscopic and chemical methods.
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