1-Azaspiro(5.5)undecan-8-ol, 7-(1-buten-3-ynyl)-2-(2-penten-4-ynyl)-, (6R-(6alpha(2S*(Z)),7beta(Z),8alpha))- 1-Azaspiro(5.5)undecan-8-ol, 7-(1Z)-1-buten-3-ynyl-2-(2Z)-2-penten-4-ynyl-, (2S,6R,7S,8S)- 34272-51-0 34685-67-1 Histrionicotoxin Histrionicotoxins