Oxyclean or enzyme product for organics?

Sorry that I didn't see this earlier. I used Shout and cold water, and it came out.

I've had luck with some impossible stains using ammonia, sudsy kind works best, just add a few drops of dish soap if not. Use the stuff straight and scrub and rinse several times, even soak a bit.

Place fabric with stain over a pan, pour boiling water over the stain and watch the stain disappear before your eyes!

Not sure it will be as successful since many other things have been used on the stain. Worth a try.