2-phenyl-4,5,8,9-tetrahydro-5,8-ethano[1,2,4]triazolo[1,2-a]pyridazine-1,3-dione

1,1,1-trifluoro-2-chloroethylperoxyl radical

甲醛-d2

乙醛-D1

α-methylphenacetyl radical