Using OCc1ccc2[nH]cc(CCCCN3CC=C(c4ccccc4)CC3)c2c1 to produce O=Cc1ccc2[nH]cc(CCCCN3CC=C(c4ccccc4)CC3)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.