4,7-Ethano-2H-thiopyrano[4,3-d]isoxazole(9CI)

4,7-Ethano-4H-thiopyrano[3,4-d]isoxazole(9CI)

4,7-Ethano[1,2]dioxino[4,5-d]isoxazole(9CI)

4,7-Ethano-2H-isoindole, 4,7-dihydro

2,4-Ethano-2H,9H-dipyrano[4,3,2-de:3, 2-g][1]benzopyran-9-one, 3,3a,4,5-tetrahydro-3-hydroxy-2,5, 5-trimethyl-, [2R- (2.alpha.,3.beta.,3a.beta.,4.alpha.)]-

2,4-dichloro-7,8-dihydro-5H-thiopyrano[4,3-d]pyrimidine 6-oxide

2,4-Dichloro-7,8-dihydro-5H-thiopyrano[4,3-d]pyrimidine 6,6-dioxide