protein

[clar]

what is the name of any of a class of foul smelling substances produced during purefaction of animal or plant protein: no longer thought to be toxic?

[terambulan]

Bombay duck is putrid fish and sauacrout is putrid cabbage.

[wildwood]

pentamethylene diamine?

tho' not non-toxic afaik

[tubeway]

Peter?

[theprof]

Is this some sort of crossword clue? The reality is that there a number of possible answers to your question, many of which have indeeed been found to be not as toxic as previously thought.

[brachiopod]

The old terms for the alkaloids produced by decomposition (esp,.that of human remains) were "putrescene" and "cadavarene".

But I'm with theprof on this one - Is this a crossword or something?