Terpestacin
UCN-01
7-Hydroxystaurosporine
UCN-02
UK-1
Usnic acid
Usninic acid, Carbonusninic acid, Usno
Umirolimus
Biolimus, Biolimus A9, TRM 986
Unguinol
Yasimin, tris-dechloronidulin
Unguisin A
Unguisin B