Using COC(=O)c1cccc2c1c1c(n2CC2CCCC2)CCCC1=O to produce COC(=O)c1cccc2c1c1c(O)cccc1n2CC1CCCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.