5-{[1-(tert-butyl)-1,1-dimethylsilyl]oxy}-2,2-dimethyl-1-pentanol

4,4-dimethylhexa-2,5-dienoic acid ethyl ester

ethyl 5-hydroxy-2,2-dimethylpentanoate

5-(tert-butyl-dimethylsilanyloxy)-2,2-dimethylpentanal

5-(tert-butyl-dimethyl-silanyloxy)-2,2-dimethylpentanoic acid ethyl ester