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(3aS,7aS,8R,14S,14aR,15S)-2,2,8,15-tetramethyl-4,5,6,7,7a,8,14,14a-octahydro-9H-8,14-methanobenzo[f][1,3]dioxolo[4,5-g]furo[3,4-b]oxonine-9,10(12H)-dione
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(3aS,7aS,8R,14S,14aR,15S)-12-hydroxy-2,2,8,15-tetramethyl-4,5,6,7,7a,8,14,14a-octahydro-9H-8,14-methanobenzo[f][1,3]dioxolo[4,5-g]furo[3,4-b]oxonine-9,10(12H)-dione