2-chloro-4,4-dimethyl-3-oxopentanoic acid ethyl ester

(R)-4-(4-(4-((((3Z,6Z)-6-benzylidene-3-((5-(tert-butyl)-1H-imidazol-4-yl)methylene)-5-oxo-3,4,5,6-tetrahydropyrazin-2-yl)oxy)methoxy)-4-oxobutyl)-1H-1,2,3-triazol-1-yl)-3-hydroxybutanoic acid