Description  Claims  Cited references 

US5847740A   [0004] 
US20050193499A   [0004] 
US6844377B   [0005] 
US2007005814A   [0005] 
US6656228B   [0050] 
US20020081421   [0050] 

The Color Index   [0031] 
Stereochemistry of Organic Compounds   [0033]