3-甲基-1,2-环己二酮

2.4-二氯苯甲醛

ethyl 7-oxo-5,6-dihydro-4H-1,3-benzothiazole-2-carboxylate

2-phenyl-6,7-dihydro-5H-1-benzofuran-4-one

甲基-2-氧代-7-四氢-4,5,6,7-苯并噻唑