histrionicotoxin

(2S,6R)-7α-[(Z)-1-Buten-3-ynyl]-2-[(Z)-2-penten-4-ynyl]-1-azaspiro[5.5]undecan-8β-ol

(2S,6R)-2α-[(Z)-2-Pentene-4-ynyl]-7α-[(Z)-1-butene-3-ynyl]-1-azaspiro[5.5]undecane-8β-ol