3H-​Indolium, 2-​[2-​[3-​[2-​(1,​3-​dihydro-​1,​3,​3-​trimethyl-​2H-​indol-​2-​ylidene)​ethylidene]​-​1-​cyclohexen-​1-​yl]​ethenyl]​-​1-​(6-​hydrazinyl-​6-​oxohexyl)​-​3,​3-​dimethyl-​, chloride, hydrochloride (1:1:1)