Raoulic acid

Raoulic acid (from the New Zealand plant, Raoulia australis) was found to possess strong antiviral activity against a number of Picornaviruses including human rhinovirus 2 (HRV2), human rhinovirus 3 (HRV3), coxsackie B3 (CB3), coxsackie B4 (CB4), and enterovirus 71 (EV71).