pyrimido,oxazine,oxazin,[1,3]oxazine
[1,3]oxazine
1357289-04-32h-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid, 3,4,6,8,12,12a-hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-ethylester,(4r,12as)- 539020-82-11H-PYRROLO[1,2-C][1,3]OXAZINE-1-THIONE,HEXAHYDRO-4,5,6,7-TETRAHYDROXY-,(4S,4AR,5S,6S,7R)-