Using O=COCCn1c(=O)c(C(=O)Nc2nnn[nH]2)nc2ccccc21 to produce O=C(Nc1nnn[nH]1)c1nc2ccccc2n(CCO)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.