Using OB(O)c1c(-c2ccccn2)nn2c1CCC2, Brc1cncc2cccnc12 to produce c1ccc(-c2nn3c(c2-c2cncc4cccnc24)CCC3)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.