3a-alpha,4-beta,7-beta,7a-alpha-Tetrahydro-4,7-epoxyisobenzofuran-1,3-dione 4,7-Epoxyisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3a-alpha,4-beta,7-beta,7a-alpha)- 6118-51-0 AI3-32678