(2S,3S)-4-(p-methoxybenzyloxy)-2,3-epoxybutanal

(4S,5R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-5-(4-methoxy-benzyloxymethyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid 2,2,2-trichloro-ethyl ester