(5S,7S,8aR)-7-Hydroxy-5-hydroxymethyl-hexahydro-oxazolo[3,4-a]pyridin-3-one

(2R,4S,6S)-2-Acetoxymethyl-4-methoxymethoxy-6-methoxymethoxymethyl-piperidine-1-carboxylic acid ethyl ester