(3S,4R)-1-(tert-Butyl-dimethyl-silanyl)-3-((R)-1-hydroxy-ethyl)-4-(2-trimethylsilanyl-[1,3]dithian-2-ylmethyl)-azetidin-2-one

ethyl 3,3-(ethylenedioxy)-4-formylbutyrate

(S,Z)-2-(2-(2-ethoxy-2-oxoethyl)-1,3-dioxolan-2-yl)-N-(1-phenylethyl)ethan-1-imine oxide

benzyl (-)-(3,4-cis,4,5-trans)-3-<3-(ethoxycarbonyl)-2,2-(ethylenedioxy)propyl>-5-methyl-2-((1S)-1-phenylethyl)isoxazolidine-4-carboxylate