ethyl 3-methyl-5-pyridin-3-ylpenta-2,4-dienoate

3-(4-phenylbuta-1,3-diyn-1-yl)pyridine

1,4-二苯基丁二炔

1,4-bis(3-pyridyl)buta-1,3-diyne

hexadeca-7,9-diyne