Using [Cr+3], C=CCCC(C)(C1=CCc2ccccc21)c1ccccn1 to produce C=CCCC(C)(C1=CC([Cr+2])c2ccccc21)c1ccccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.