Invalid SMILES

could not parse 'OCC@H1OC@@(CO)(OC@H2OC@H(CO)C@@H(O)C@H(O)C@H2O)C@@H(O)C@@H1O', unexpected character
OCC@H1OC@@(CO)(OC@H2OC@H(CO)C@@H(O)C@H(O)C@H2O)C@@H(O)C@@H1O
   ^