Clavulanate Potassium EP Impurity B 

Chemical Name: 3-(3,6-Bis(2-hydroxyethyl)pyrazin-2-yl)propanoic acid, sodium salt

Smiles: OCCC1=CN=C(CCO)C(CCC(O)=O)=N1.[Na]

Inchi: InChI=1S/C8H12N2O2/c11-3-1-7-5-10-8(2-4-12)6-9-7/h5-6,11-12H,1-4H2