3-(triphenyl-λ⁵-phosphanylidene)butan-2-one

2,3-二溴丁烷

2,3-bis(p-toluenesulfonyloxy)butane

(2R,3R)-2,3-丁烷二基二(4-甲基苯磺酸酯)

2-(prop-1-yn-1-yl)thiophene