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| Number | Title | Issue Date |
| 7557118 | Preparation of fused polycyclic alkaloids by ring closure of azomethine ylides, novel compounds thereof and their use as chemotherapeutic agents A method for the preparation of a compound of general Formula: or pharmaceutically acceptable derivatives and salts, racemates, isomers and/or tautomers thereof comprising cyclizing an azomethine ylide of general Formula: | 07/07/2009 |
