I see, you're right - according to Wikipedia: "Muscarine is only a trace compound in the fly agaric Amanita muscaria; the pharmacologically more relevant compo

I see, you're right - according to Wikipedia: "Muscarine is only a trace compound in the fly agaric Amanita muscaria; the pharmacologically more relevant compounds from this mushroom are ibotenic acid and muscimol. A. muscaria fruitbodies contain a variable dose of muscarine, usually around 0.0003% fresh weight." Looks like there's a historical reason why muscarine is associated with Amanita muscaria: it was first isolated from the mushroom by a German chemist in 1869.