2-methyl-3-methylidene-4-phenylpyrido[2,3-b]pyrazine

2,3-二甲基-5H-吡咯并[3,4-b]吡嗪-5,7(6H)-二酮

5,6-二甲基-[1,2,5]噁二唑并[3,4-b]吡嗪

1,3-diphenylpentane-1,4-dione

2,2,3,3-tetrafluorobutane