Complex sentence: However, Krakauer later suggested that McCandless had not confused the two plants, and had instead actually eaten Hedysarum alpinum, and had the plant tested for any toxins, and through tests on Hendysarum alpinum, it was discovered that it contained an unidentifiable form of toxin.
Split into simpler sentences: However, Krakauer later suggested that McCandless had not confused the two plants, and had instead actually eaten Hedysarum alpinum. Krakauer had the plant tested for any toxins and, through tests on Hendysarum alpinum, it was discovered that it contained an unidentifiable form of toxin.