2-methyl-4-propan-2-ylidene-1,3-oxazol-5-one

N-乙酰基爱萨霉素A

2,3,7-trimethylchromen-4-one

(6-oxocyclohexen-1-yl)methyl acetate

2-乙酰氨基-4-溴苯酚