Emodin

Emodin is a compound found in rhubarb, buckthorn and Japanese knotweed.

Emodin is also shown to have antiviral activity against cytomegalovirus, herpes simplex , Coxsackie B3 , and Coxsackie B4 https://www.researchgate.net/publication/257135335_In_Vitro_and_in_Vivo_Studies_of_the_Inhibitory_Effects_of_Emodin_Isolated_from_Polygonum_cuspidatum_on_Coxsakievirus_B-4<?/ref>