1. Department of Process Organic Chemistry, Ionis Pharmaceuticals, 2855 Gazelle Court, Carlsbad, California 92010, United States
2. Thermo Fisher Scientific, 6173 E Old Marion Hwy, Florence, South Carolina 29506, United States
3. Boehringer Ingelheim Pharmaceuticals, 900 Ridgebury Rd, Ridgefield, Connecticut 06877, United States