Using C1COCCN1, Cc1nn(-c2ccccn2)c2nc3ccccc3c(Cl)c12 to produce Cc1nn(-c2ccccn2)c2nc3ccccc3c(N3CCOCC3)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.