1,6-Dioxaspiro<4.4>nonan-2,7-dion, 4,4-Dihydroxypimelic acid dilactone, 1,6-Dioxaspiro[4.4]nonane-2,7-dione, 1,6-dioxaspiro[4,4]nonane-2,7-dione, Spirodilactone, spiro<4,4>dibutyrolactone
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