9-butyl-9H-indeno[2,1-b]pyridine

9,9-dibutylindeno[2,1-b]pyridine

9-butyl-3-methyl-9H-indeno[2,1-c]pyridine

9,9-dibutyl-3-methylindeno[2,1-c]pyridine

9-butyl-2-methyl-9H-fluorene