Using C=COCC, O=C1OC(CO)CN2C1=Cc1ccsc1S2(=O)=O to produce CCOC(C)OCC1CN2C(=Cc3ccsc3S2(=O)=O)C(=O)O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.