ethyl 2-ethoxy-3-methyl-2,3-bis(trimethylsilyloxy)butanoate

ethyl 3-hydroxy-3-methyl-2-oxobutanoate

2,2-dimethyl-5-phenyl-3-propan-2-yl-1,3,4-thiadiazole

6-benzyl-2,2-dimethyl-1,3-dioxin-4-one

3-bromoinden-1-one