[mistryous]

Can someone please give me at least some more in-depth information on why the liquid manure of the nettle plant has that odor of sewage to it?
I cannot find anything valuable except for a hint that the odor may mostly result from the fermentation and decomposition of histamine, serotonine, etc. - as present in the stuff that stings you.
Well, it would explain why the odor is so special to this plant's liquid manure, but I don't know.
I would like to know in more exact terms.

What would be the resulting odorants, then? Some indole and amine molecules of some kind, maybe? But what exactly?
Is there anything existent that's close to an analysis to this problem? An article incl. a GCMS analysis of the odorants would be perfect but I doubt that it exists? I couldn't find anything valuable.