<unk>  is a solid polycyclic aromatic hydrocarbon consisting of three fused benzene rings derived from coal-tar.<unk>  is used in the artificial production of the red dye alizarin. It is also used in wood preservatives, insecticides, and coating materials.<unk>  is colorless but exhibits a blue (400-500 nm peak) fluorescence under ultraviolet light.
Anthracene
Methacholine
Theobromine
Benzydamine
Rescinnamine
Tiratricol
Methylscopolamine
Methoxyflurane