1,2-Benzenediol, 4-(5,6-dihydro(1,2,4)triazolo(5,1-a)isoquinolin-2-yl)- 4-(5,6-Dihydro(1,2,4)triazolo(5,1-a)isoquinolin-2-yl)-1,2-benzenediol 80830-10-0