18096-62-3 4,4a,5,9b-Tetrahydroindeno(1,2-d)-1,3-dioxin 4,4a,5,9b-Tetrahydroindeno(1,2-d)-1,3-dioxine 4,5-Indeno-1,3-dioxan Dihydroindenyl-2,4-dioxane EINECS 241-997-4 Indeno(1,2-d)-1,3-dioxin, 4,4a,5,9b-tetrahydro-