Using O=C1CCC(=O)O1, Cc1cccc(C)c1CNc1cccn2c(C)c(CO)nc12 to produce Cc1cccc(C)c1CNc1cccn2c(C)c(COC(=O)CCC(=O)O)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.