Using COCCCl, O=c1[nH]c(=O)n(C2CC2)c2ncn(Cc3ccccc3)c12 to produce COCCn1c(=O)c2c(ncn2Cc2ccccc2)n(C2CC2)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.