Reference(s) for synthesis of 2,7-Dimethyl-1,6-dioxaspiro[4.4]nonane
Perkins, M.V., Kitching, W., Drew, R.A.I., Moore, C.J., and Konig, W.A. 1990. Chemistry of fruit flies: composition of the male rectal gland secretions of some species of South-East Asian Dacinae. Re-examination of Dacus cucurbitae (melon fly). J. Chem. Soc. Perkin Trans. 1:1111-1117.