Description  Claims  Drawing  Cited references 

EP0534859A   [0004]  [0079] 
US7176197B   [0009] 
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WO2008065681A   [0014]  [0062] 
WO2012025940A   [0014]  [0063] 
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WO2013017582A   [0016] 
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ICH Topic Q3C (R4) Impurities: Guideline for Residual Solvents   [0015]