Dispiro[cyclohexane-​1,​2'-​pyrrolidine-​3',​3''-​[3H]​indole]​-​5'-​carboxamide, 6''-​chloro-​4'-​(3-​chloro-​2-​fluorophenyl)​-​N-​[4-​[[[5-​[2-​(2,​6-​dioxo-​3-​piperidinyl)​-​2,​3-​dihydro-​1-​oxo-​1H-​isoindol-​4-​yl]​-​4-​pentyn-​1-​yl]​amino]​carbo