4000-72-0 
 
(2S,4EZ)-1(tert-butoxycarbonyl)-4-(methoxyimino)-2-pyrrolidinecarboxylicacid 
 
4385-75-5 
 
(2S,4EZ)-N-(1-hydroxycyclohexyl)methyl-4-(methoxyimino)-1-4-(3-pyridinyl)benzoyl-2-pyrrolidinecarboxamide 
[1]Patent:US2003/212012,2003,A1