4-chloro-5-ethylpyrrolo[3,2-d]pyrimidine

1-bromo-2-ethoxy-4-fluorobenzene

1-ethylpyridin-1-ium iodide

4-甲基-2,3-二氢噻吩 1,1-二氧化物

2-ethyl-3-methyl-4,5-dihydrothiophene 1,1-dioxide