TY  - BOOK
AU  - Luger,P.
AU  - Weber,M.
AU  - Dung,M.X.
AU  - Ky,P.T.
AU  - The,C.L.
TI  - The New Pentacyclic Saponine Ecdysantherin [3/9-Hydroxy-20-methylpregn-5,14- dien- 16-one-(18-20 )-lactone ] from Ecdysanthera rosea Hook. et Am. (Apocynaceae)of Vietnam
N2  - Ecdysantherin, 3/3-hydroxy-20-methylpregn-5,14-dien- 16-one-(18-20)-lactone, C21H2604, a new pentacyclic sap©nine, was isolated from the powder of Ecdysanthera rosea Hook. et Am. (Apocynaceae)of Vietnam, and its structure was elucidated. It was found that ecdysantherin is a pentacyclic sap©nine molecule with three sixmembered and two five-membered rings. An intermolecular OH.-.O hydrogen bond generates infinite chains of molecules in the z direction
UR  - https://drive.google.com/file/d/1Mj4zwYrTsqcV1qCJ8t6dpf_25DMUZo1P/view?usp=drivesdk
ER  -