SEARCH Articles Figures Tables 1.2.3.4- Tetrahydro-6-nitro pyrimidine2,4-dione 1.3- Oxazine-4,6-diones tetrahydro- from 2.3.6.7- Tetrahydro-177,5/7-pyrido quinazoline-1,3-diones 9.10- Dimethoxy-2,3,6,7-tetrahydro-4//pyrimido isoquinoline-2,4-dione 9.10- Dimethoxy-3,4,6,7-tetrahydro-2 pyrimido isoquinolin-2,4-dione Furan-3,4-diones, tetrahydro