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![(+)-methyl (1β,2α,6β)-2-hydroxy-7-oxabicyclo[4,1,0]hept-3-ene-4-carboxylate结构式](https://image.chemsrc.com/caspic/051/106861-61-4.png)
![5-bromo-4-(1-ethoxyethoxy)-2H-benzo[d]1,3-dioxolane结构式](https://image.chemsrc.com/caspic/228/192210-65-4.png)
![methyl 5-(butyryloxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylate结构式](https://image.chemsrc.com/caspic/091/288395-83-5.png)
![(+)-5-(tert-butyl-dimethylsilanyloxy)-7-oxa-bicyclo[4.1.0]hept-3-ene-3-carboxylic acid methyl ester结构式](https://image.chemsrc.com/caspic/222/288395-75-5.png)
![(3aS,3bR,12S,12aR)-6,12-dihydroxy-4-(4-methoxybenzyl)-2,2-dimethyl-3b,4,12,12a-tetrahydrobis([1,3]dioxolo)[4,5-c:4',5'-j]phenanthridin-5(3aH)-one结构式](https://image.chemsrc.com/caspic/439/288395-87-9.png)
![N-((1R,5S,6R)-5-((tert-butyldimethylsilyl)oxy)-7-oxabicyclo[4.1.0]hept-3-en-3-yl)-4-hydroxy-N-(4-methoxybenzyl)benzo[d][1,3]dioxole-5-carboxamide结构式](https://image.chemsrc.com/caspic/487/200182-33-8.png)
![(1S,2R,4aS,11bR)-1-((tert-butyldimethylsilyl)oxy)-2,7-dihydroxy-5-(4-methoxybenzyl)-1,4a,5,11b-tetrahydro-[1,3]dioxolo[4,5-j]phenanthridin-6(2H)-one结构式](https://image.chemsrc.com/caspic/287/200182-38-3.png)
![(6aS,7aR,8aR,9S,9aR)-9-((tert-butyldimethylsilyl)oxy)-4-hydroxy-6-(4-methoxybenzyl)-6a,7,7a,8a,9,9a-hexahydro-[1,3]dioxolo[4,5-j]oxireno[2,3-b]phenanthridin-5(6H)-one结构式](https://image.chemsrc.com/caspic/449/200182-34-9.png)
![(3aS,3bR,12S,12aR)-4-(4-methoxybenzyl)-2,2-dimethyl-5-oxo-3a,3b,4,5,12,12a-hexahydrobis([1,3]dioxolo)[4,5-c:4',5'-j]phenanthridine-6,12-diyl diacetate结构式](https://image.chemsrc.com/caspic/325/200182-37-2.png)
![(3aS,3bR,10bR,11S,12R,12aS)-11-((tert-butyldimethylsilyl)oxy)-4-(4-methoxybenzyl)-2,2-dimethyl-5-oxo-3a,3b,4,5,10b,11,12,12a-octahydrobis([1,3]dioxolo)[4,5-c:4',5'-j]phenanthridine-6,12-diyl diacetate结构式](https://image.chemsrc.com/caspic/363/200182-36-1.png)
