English: DE2635209 idem Franz Troxler, Fritz Seemann, US4434176 (1984 to Sandoz Ltd.).
Franz Dr Troxler & Albert Dr Hofmann, CH453363 (1968 to Sandoz AG).
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse