Using O=C(c1ccccc1)c1ncc(-c2cnc(-c3cccnc3)[nH]2)cn1 to produce OC(c1ccccc1)c1ncc(-c2cnc(-c3cccnc3)[nH]2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.