Using O=C(Cc1ccccc1)NCCc1cccc2ccc3c(c12)C(=O)CC(=O)N3 to produce O=C(Cc1ccccc1)NCCc1cccc2ccc3c(c12)CCC(=O)N3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.