Using C=C(C(=C)P(=O)(OCC)OCC)P(=O)(OCC)OCC, [S-2] to produce CCOP(=O)(OCC)C1CSCC1P(=O)(OCC)OCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.