Using O=C(O)c1ccc2c(-c3nc4ccccc4[nH]3)n[nH]c2c1, NC1CC1 to produce O=C(NC1CC1)c1ccc2c(-c3nc4ccccc4[nH]3)n[nH]c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.