Using C=O, Cc1cc(N)ncc1CN1CCN(C(=O)OC(C)(C)C)[C@@H](C)C1 to produce CNc1cc(C)c(CN2CCN(C(=O)OC(C)(C)C)[C@@H](C)C2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.