1H-​Pyrrole-​3-​carboxamide, N-​[2-​(ethylamino)​ethyl]​-​5-​[(5-​fluoro-​1,​2-​dihydro-​2-​oxo-​3H-​indol-​3-​ylidene)​methyl]​-​2,​4-​dimethyl-​, hydrochloride (1:1)