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![2-((2R,4S,6S,8R,9S)-4-(benzyloxy)-8-((S)-sec-butyl)-9-methyl-1,7-dioxaspiro[5.5]undec-10-en-2-yl)ethan-1-ol结构式](https://image.chemsrc.com/caspic/283/87319-11-7.png)
![(2S,3S,E)-6-((2R,4S,6S,8R,9S)-8-((S)-sec-butyl)-4-((tert-butyldimethylsilyl)oxy)-9-methyl-1,7-dioxaspiro[5.5]undec-10-en-2-yl)-3-((tert-butyldimethylsilyl)oxy)-2,4-dimethylhex-4-en-1-ol结构式](https://image.chemsrc.com/caspic/298/105313-52-8.png)
![(2-((2R,4S,6S,8R,9S)-4-(benzyloxy)-8-((S)-sec-butyl)-9-methyl-1,7-dioxaspiro[5.5]undec-10-en-2-yl)ethoxy)(tert-butyl)diphenylsilane结构式](https://image.chemsrc.com/caspic/321/87319-10-6.png)
![methyl (3aR,6S,7R,7aR,E)-3-((2E,4S,5S,6E)-8-((2R,4S,6S,8R,9S)-8-((S)-sec-butyl)-4-hydroxy-9-methyl-1,7-dioxaspiro[5.5]undec-10-en-2-yl)-5-hydroxy-4,6-dimethylocta-2,6-dien-1-ylidene)-3a,7-dihydroxy-6-methyl-2,3,3a,6,7,7a-hexahydrobenzofuran-4-carboxylate结构式](https://image.chemsrc.com/caspic/044/102979-83-9.png)