Using NCC1CCCC1, O=C=NC1CCN(CC23CC(c4ccccc42)c2ccccc23)CC1 to produce O=C(NCC1CCCC1)NC1CCN(CC23CC(c4ccccc42)c2ccccc23)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.