(S)-2,2,2-trifluoro-N-(2-hydroxy-1-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)ethyl)-N-(3-methylbut-2-en-1-yl)acetamide

methyl (S)-4-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)-4-(2,2,2-trifluoro-N-(3-methylbut-2-en-1-yl)acetamido)but-2-enoate

methyl (S)-4-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)-4-((3-methylbut-2-en-1-yl)amino)but-2-enoate

(S,E)-ethyl 3-(2-oxooxazolidin-4-yl)acrylate