Using O=C(O)c1ccccc1, CCCCO[C@@H](C)CC[C@H](C)O to produce CCCCO[C@@H](C)CC[C@@H](C)OC(=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.