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(1R,2E,5R,8E,10Z,14E,17R)-5-(hydroxymethyl)-3,11-dimethyl-19-methylene-6,21-dioxabicyclo[15.3.1]henicosa-2,8,10,14-tetraene-7,13-dione
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(2E,8E,10Z,14E)-(1R,5R,13R,17R)-5-(3,4-Dimethoxy-benzyloxymethyl)-13-hydroxy-3,11-dimethyl-19-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-2,8,10,14-tetraen-7-one
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(2E,8E,10Z,14E)-(1R,5R,13R,17R)-13-(tert-Butyl-dimethyl-silanyloxy)-5-(3,4-dimethoxy-benzyloxymethyl)-3,11-dimethyl-19-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-2,8,10,14-tetraen-7-one
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