Yay for chemistry!
I've synthesized the first two compounds at the lab:
(2',4'-dinitrobenzyl)pyridine: Changes color to bright purple when exposed to light. Loses it's color and turns grey in the darkness.
Triphenylmethanol: Is bright yellow in acidic environment. And looks bad-ass :D
Caffeine: the stuff that is in coffee and makes you awake!
Ethanol: yay, alcohol! (Also note how it looks like a doggie :D )