1-Acetyl-4,5-dihydro-2-methyl-1H-pyrrol-3-carbonsaeure-ethylester

甘氨酸乙酯盐酸盐

ethyl 5-methyl-2-phenylsulfanyl-2,3-dihydrofuran-4-carboxylate

1,2-二氯乙氧基乙烷