2-ethynyloctanoic acid

6-chlorohex-2-ynoic acid

4-氯-7-(三氟甲基)喹啉-3-羧酸

5-methyl-2-prop-1-ynylthiophene-3-carboxylic acid

5-methyl-2-(2-phenylethynyl)thiophene-3-carboxylic acid