(3a-alpha,4-beta,7-beta,7a-alpha)-Hexahydro-4,7-epoxyisobenzofuran-1(3H)-one 4,7-Epoxyisobenzofuran-1(3H)-one, hexahydro-, (3a-alpha,4-beta,7-beta,7a-alpha)- 51155-03-4