According to Wikimedia, they are from left to right: Sophie, Maximilian Emanuel, Carl Theodor, Helene Karoline Therese, Ludwig Wilhelm, Mathilde Ludovika and Maria Sophie Amalie. Only Elisabeth is missing from this portrait.
Maximilian Emanuel married Amelie of Saxe Coburg Gotha, Carl Theodore married Sophie Marie of Saxony and then Maria Josepha of Portugal, and Ludwig Wilhelm married Marie Larisch.
From Wikimedia. A smaller version of this group portrait had been posted to Helene of Thurn und Taxis and Mathilde Trani’s Albumette. That image was replaced by this one.