When it comes to images of the molecular structure of serotonin, which of these is more accurate?

http://en.wikipedia.org/wiki/Image:Serotonin_biosynthesis.svg (look down in the diagram where the Serotonin is.
http://www.chemicalforums.com/organics/Serotonin.JPG

This is for a potential tattoo on the back of my neck, so I’m being picky.
Nikipedia, i’m particularly interested in your response.