4-methyl-N-[(Z)-3-methylbutan-2-ylideneamino]benzenesulfonamide

3-methyl-4,4-bis(methylthio)but-3-en-2-one

cyclopent-2-en-1-yl 2,2-dimethyl-3-oxobutanoate

3-溴噻吩-2-甲醛

1-溴-3-甲基-2-丁酮