2-[5-(2-hydroxyethyl)pyrazin-2-yl]ethanol; 2,2′-(pyrazine-2,5-diyl)diethanol; Potassium Clavulanate - Impurity A (EP/BP); 2,2'-(2,5-Pyrazinediyl)diethanol; 2,5-Bis(2-hydroxyethyl)pyrazine; 2,5-Pyrazinediethanol; 2-[5-(2-Hydroxyethyl)pyrazin-2-yl]ethan-1-ol