17630-76-1 1H-indole-2,3-dione, 5-chloro- 5-chloro-1H-indole-2,3-dione InChI=1/C8H4ClNO2/c9-4-1-2-6-5(3-4)7(11)8(12)10-6/h1-3H,(H,10,11,12