6-[1-(3,5,5,8,8-pentamethyl-6,7-dihydronaphthalen-2-yl)ethenyl]pyridine-3-carboxylic acid
6-[1-(1,1,4,4,7-pentamethyltetralin-6-yl)vinyl]pyridine-3-carboxylic acid
6-[1-(1,1,4,4,7-pentamethyl-6-tetralinyl)vinyl]-3-pyridinecarboxylic acid
6-[1-(1,1,4,4,7-pentamethyltetralin-6-yl)vinyl]nicotinic acid