Chemical christmas tree

Links
- https://www.bigs-drugs.uni-bonn.de/pictures/sonsitiges-z-b-colorbox/img-20171223-wa0003.jpg/image_view_fullscreen
- https://www.bigs-drugs.uni-bonn.de/pictures/sonsitiges-z-b-colorbox/img-20171223-wa0003.jpg/@@download/image/IMG-20171223-WA0003.jpg