2,4-dimethoxy-6-(4-nitroanilino)-1,3,5-triazine 生成 3,5-dimethyl-6-(4-nitroanilino)-2,3,4,5-tetrahydro-1,3,5-triazine-2,4-dione 、 3,5-dimethyl-6-(N-methyl-4-nitroanilino)-2,3,4,5-tetrahydro-1,3,5-triazine-2,4-dione 、 1,3,5-trimethyl-6-(4-nitrophenylimino)-1,3,5-triazine-2,4-dione