1. US 9.284.267 9.199.924 and 8.987.446 (2015/2016 Bayer); US 8.987.497 (2015 BASF); US 5.821.377 (1997 Bayer); US 5.498.742 (Bayer); US 5.856.554 (1999 Bayer); 5.898.079 (1999 GE); 5.907.051 (1999 Daicel); US 5.917.077 (1999 GE); US 6.037.298 (2000 BP); US 6.472.551 (2003 GE); Cornils/Herrmann‐1 Vol. 1 p.169;
2. Falbe‐1;
3. and2012 352 63;