Using CCOC(=O)c1cc2c(C3CCCCC3)c(-c3ccccc3)[nH]c2s1 to produce O=C(O)c1cc2c(C3CCCCC3)c(-c3ccccc3)[nH]c2s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.