Using O=c1[nH]c(CCl)nc2c1COCC2, COCCNC(=O)OC(C)(C)C to produce COCCN(Cc1nc2c(c(=O)[nH]1)COCC2)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.