PROCESS FOR MAKING TETRACYCLIC HETEROCYCLE COMPOUNDS
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Jul 10, 2015
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Jul 11, 2014
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Abstract
The present invention is directed to a process for making Tetracyclic Heterocycle Compounds of Formula (I) and pharmaceutically acceptable salts thereof, wherein X1, X2, R1, R2 and R3 are defined above herein. The present invention is also directed to compounds that are useful as synthetic intermediates in the process of the invention.
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