Abstract     Description     Claims     Drawing  

US4167618A   [0003] 
US20080200585A1   [0003] 
US20130030076A1   [0003] 
US6894144B   [0003] 
US20030153726A1   [0003] 
US3453242A   [0041] 

J. Am. Chem. Soc.   [0067] 
J. Org. Chem.   [0067]