Using O=C(Cn1ccnc1)c1ccc2c(c1)Cc1ccccc1-2, OCCO to produce c1ccc2c(c1)Cc1cc(C3(Cn4ccnc4)OCCO3)ccc1-2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.