Using CCc1cnc(C)n2c(CCc3nc(N4CCCC4)nn3C)nnc12 to produce CCc1cnc(C)n2nc(CCc3nc(N4CCCC4)nn3C)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.