(4S,5R)-5-Benzyloxymethyl-4-{2-[2-(2,2-dimethyl-[1,3]dioxan-5-yl)-ethyl]-[1,3]dithian-2-ylmethyl}-2,2-dimethyl-[1,3]dioxane 生成 (3R,4S,6R,9S)-3-Benzyloxymethyl-9-hydroxymethyl-1,7-dioxa-spiro[5.5]undecan-4-ol 、 (3R,4S,6R,9R)-3-Benzyloxymethyl-9-hydroxymethyl-1,7-dioxa-spiro[5.5]undecan-4-ol 、 (3S,4R,6R,9S)-3-Benzyloxymethyl-9-hydroxymethyl-1,7-dioxa-spiro[5.5]undecan-4-ol 、 (3S,4R,6R,9R)-3-Benzyloxymethyl-9-hydroxymethyl-1,7-dioxa-spiro[5.5]undecan-4-ol