A comprehensive reinvestigation of chemical constituents from the rhizomes of Hedychium spicatum led to the isolation of two new labdane-type diterpene (1, 2), together with six known compounds (3-8). Their structures were established on the basis of extensive spectroscopic (IR, MS, 2D NMR) data
Two new labdane-type diterpenoids, hedyforrestin D (1) and 15-ethoxy-hedyforrestin D (2), and three known compounds, yunnancoronarin A (4), B (3) and C (5) were isolated from the rhizomes of Hedychium forrestii. The structure of the new diterpenoids was established as
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