SEARCH Articles Figures Tables 3,1 -Benzoxazine-2,4-dione 3,l-Benzoxazine-2,4-diones 3,l-benzoxazine-2,4 -dione 3.1- Benzoxazine-2,4-diones anhydrides Benzoxazine L,3-Benzoxazin-2,4-dione