Using O=C1CCC2(CC1C(=O)c1ccc3ncsc3c1)OCCO2, CC[O-] to produce CCOC(=O)CCC1(CCC(=O)c2ccc3ncsc3c2)OCCO1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.