3-phenyl-3a,5,6,6a-tetrahydrothieno[2,3-d][1,2]oxazole

3-phenyl-3a,4,5,6a-tetrahydrothieno[3,2-d][1,2]oxazole

3-(2,4,6-trimethylphenyl)-3a,5,6,6a-tetrahydrothieno[2,3-d][1,2]oxazole

3-(2,4,6-trimethylphenyl)-3a,4,5,6a-tetrahydrothieno[3,2-d][1,2]oxazole