Using CCCCn1nc(C(OC)OC)nc1Cc1ccc(-c2ccccc2-c2nnn[nH]2)nc1 to produce CCCCn1nc(C=O)nc1Cc1ccc(-c2ccccc2-c2nnn[nH]2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.