Phalloin is isolated and prepared from Amanita fuliginea by means of reversed- phage high-performance liquid chromatography, the purities of the yield are over 99%. Phalloin were identified through the cyclopeptide determination, UV spectrograph and MS. The molecular weight is 772.36 dalton. Phalloin can cause plant cellular to be necrosis. The LD50 in white mice is LD50 = 1 414 μg· kg-1. Phalloin can cause the liver of the white mice to be hyperemia and the ...