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(1S,4R)-4,7,7-Trimethyl-3-oxo-2-oxa-bicyclo[2.2.1]heptane-1-carboxylic acid (1R,4aR,8aR)-2,5,5,8a-tetramethyl-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-ylmethyl ester
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(1S,4R)-4,7,7-Trimethyl-3-oxo-2-oxa-bicyclo[2.2.1]heptane-1-carboxylic acid (1S,4aS,8aS)-2,5,5,8a-tetramethyl-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-ylmethyl ester
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(4aR,6aR,13aS,13bR)-4,4,6a,13b-Tetramethyl-1,2,3,4a,5,6,6a,13,13a,13b-decahydro-4H-7,9,11-trioxa-benzo[a]cyclopenta[i]anthracene