Using O=S(Cl)Cl, CCOCn1c(CCCO)nc2c(N(Cc3ccccc3)Cc3ccccc3)nc3ccccc3c21 to produce CCOCn1c(CCCCl)nc2c(N(Cc3ccccc3)Cc3ccccc3)nc3ccccc3c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.