Using COC(=O)CCn1c(C2CC2)c(Cc2cccnc2)c2ccccc21 to produce O=C(O)CCn1c(C2CC2)c(Cc2cccnc2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.