methyl ester of trans-2-methyl-2-trimethylsilylethynylcyclopropanecarboxylic acid

methyl 2-methylidenecyclopropane-1-carboxylate

methyl 2-(1,2,5-oxadiazol-3-yl)acetate

3-cyano-6-methoxycarbonyl-2-oxabicyclo[3.1.0]hex-3-ene

2-(furan-2-yl)-5-methoxyoxazole