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(11E,16E)-(2R,5R,10S,15S,18S)-10-Ethyl-18-methoxy-11,15-dimethyl-13-methylene-2-(2,4,6-trimethyl-phenyl)-1,3,9-trioxa-spiro[4.13]octadeca-11,16-diene-6,8-dione
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(11E,16E)-(2R,5R,7R,10S,15S,18R)-10-Ethyl-18-methoxy-7,11,15-trimethyl-13-methylene-2-(2,4,6-trimethyl-phenyl)-1,3,9-trioxa-spiro[4.13]octadeca-11,16-diene-6,8-dione
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(11E,16E)-(2R,5R,7R,10S,15S,18S)-10-Ethyl-18-methoxy-7,11,15-trimethyl-13-methylene-2-(2,4,6-trimethyl-phenyl)-1,3,9-trioxa-spiro[4.13]octadeca-11,16-diene-6,8-dione
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