(2R,4S,5R)-2-(4-Methoxy-phenyl)-5-methyl-4-prop-2-ynyl-[1,3]dioxane

{(2S,6R,8S)-8-[(R)-2-(4-Methoxy-benzyloxy)-1-methyl-ethyl]-10-methyl-1,7-dioxa-spiro[5.5]undec-10-en-2-yl}-methanol