Description  Claims  Cited references 

EP2236150A   [0002] 
US5679864A   [0005] 
WO9716403A   [0005] 
US7507864B   [0005] 
DE2501220   [0006] 
WO2007110168A   [0006]  [0008]  [0020] 
EP861223A   [0008]  [0020] 

Liebigs Ann Chem   [0005] 
JCS Perkin Trans   [0005]