Using CC(C)(C)OC(=O)N1CCn2c1nc1cnc3cccnc3c12, [NH4+] to produce CC(C)(C)OC(=O)N1CCn2c1nc1c(N)nc3cccnc3c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.