3-(2-pyridin-3-ylethynyl)pyridine

2-methyl-1-phenylbut-3-en-1-one

1-chloro-2-[2-(2-chlorophenyl)ethynyl]benzene

1-methoxy-2-[2-(2-methoxyphenyl)ethynyl]benzene

4,4-dimethyl-1-trimethylsilylpent-1-yn-3-one