Using [NH4+], CCCc1nc2cnc3cccnc3c2n1CCCC(=O)N1CCOCC1 to produce CCCc1nc2c(N)nc3cccnc3c2n1CCCC(=O)N1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.