4,4-Dioxo-3,5-bis(2,4,6-trimethylphenyl)-3a,4a,7a,7b-tetrahydrothieno[2,3-d:4,5-d']diisoxazoline

3,7-dimesityl-3a,4a,7a,7b-tetrahydrothieno[2,3-d:4,5-d']diisoxazole 4,4-dioxide