(S)-5-((Z)-3-((4R,5R)-2,2,5-trimethyl-1,3-dioxolan-4-yl)allyl)dihydrofuran-2(3H)-one

stagonolide G

ethyl (2E,4R,6S,7S,10S,12E)-4-(tert-butyldimethylsilyloxy)-10-(tert-butyldiphenylsilyloxy)-7-hydroxy-6-(trityloxymethyl)tetradeca-2,12-dienoate

(S)-7-((tert-butyldimethylsilyl)oxy)-1-((4R,5R)-2,2,5-trimethyl-1,3-dioxolan-4-yl)hept-1-yn-4-ol