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Diterpenoids from the rhizomes of Alpinia calcarata
1Faculty of Pharmacy, Meijo University, Tempaku, Nagoya 4688503, Japan, and China Pharmaceutical University, Nanjing 210009, People's Republic of China.
Journal of Natural Products
|August 5, 2000
Abstract:
Four new labdane-type diterpenoids, calcaratarins A-D (1-4), along with six known labdane-type diterpenoids, a known elemane-type sesquiterpenoid, and a known coumarin, were isolated from the rhizomes of Alpinia calcarata. The structures of 1-4 were elucidated on the basis of spectroscopic studies.