2,2-Dimethyl-propionic acid (2S,4S,6R,8R,10S)-8-benzyloxymethyl-10-hydroxy-4-methoxy-1,7-dioxa-spiro[5.5]undec-2-ylmethyl ester

(2R,4S,6R,8S,10S)-2-Benzyloxymethyl-8-hydroxymethyl-10-methoxy-1,7-dioxa-spiro[5.5]undecan-4-ol

(2R,4S,6S,8S,10S)-2-Benzyloxymethyl-8-hydroxymethyl-10-methoxy-1,7-dioxa-spiro[5.5]undecan-4-ol

(4S,5R)-2-(3,4-Dimethoxy-phenyl)-4-((S)-1-[1,3]dithian-2-yl-ethyl)-5-methyl-[1,3]dioxane

[(2S,4S,6R,8R,10S)-8-Benzyloxymethyl-10-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-1,7-dioxa-spiro[5.5]undec-2-yl]-methanol