Using Clc1cccc2c1ccn2Cc1cn(C(c2ccccc2)(c2ccccc2)c2ccccc2)cn1 to produce Clc1cccc2c1ccn2CC1=CNCN1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.