Using S=c1n(N=Cc2ccccc2)ccn1N=Cc1ccccc1, C[O+](C)C to produce CSc1n(N=Cc2ccccc2)cc[n+]1N=Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.