Using COC1CN(C(=O)OC(C)(C)C)CCC1n1c(C2CC2)nc2cc(C)ccc21 to produce COC1CNCCC1n1c(C2CC2)nc2cc(C)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.