Navalny's Widow Accuses Putin Kremlin denies UK claims Russia poisoned Navalny with epibatidine. Epibatidine found in Navalny's samples, linked to Ecuadorian dart frogs. Navalny's widow claims Putin used chemical weapon, thanks European states Political | Chemical Weapon | Denial United Kingdom | Russia | Ecuador Vladimir Putin | Alexei Navalny | Yulia Navalnaya 1 week ago