Using O=CC(=O)O, CCCc1nn(C)c2c(=O)[nH]c(Cc3ccc(N)cc3)nc12 to produce CCCc1nn(C)c2c(=O)[nH]c(Cc3ccc(NCC(=O)O)cc3)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.