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US 8,263,644 B2Granted
Cytotoxic xanthone compounds
AssigneeBristol-Myers Squibb Company
InventorsJohn E. Leet, Craig R. Fairchild, Stephen W. Mamber, Xiaohong Liu
Life of this patent
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Abstract
The present invention relates to xanthone compounds isolated from the plant Psorospermum molluscum Hochr. (Clusiaceae), a Madagascar plant, which are potent cytotoxic agents.
Claims8
An isolated compound having the formula,
- wherein R1 and R2 are taken together to form a group
- or a pharmaceutically-acceptable salt thereof.
An isolated compound having the following formula:
- or a pharmaceutically-acceptable salt thereof.
Dependencies are inferred from the claim text.