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I found your #494013 when looking for (E)-7-methyl-1, 6-dioxaspiro[4.5]decane, so close but not close enough. If possible, it would be nice to have the latter which is a biologically active compound. Zhang Q-H, Tolasch T, Schlyter F, Francke W. 2002. Enantiospecific antennal response of bark beetles to spiroacetal (E)-conophthorin. J Chem Ecol 28: 1839-1852
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