2-(4-(dimethylamino)styryl)-1-methylpyridinium [ 2-(p-(dimethylamino)styryl)-1-methylpyridinium,2-(p-(dimethylamino)styryl)-1-pyridinium methiodide,2-(para-(dimethylamino)styryl)-1-methylpyridinium,DASPMI ] fluorescent probe refers to mitochondria in situ; RN given for methiodide