The molecule is an ammonium ion obtained by the protonation of the tertiary amino group of fumigaclavine C; major species at pH 7.3. It is an ammonium ion derivative and an organic cation. It is a conjugate acid of a fumigaclavine C.
[(6aR,9S,10S,10aR)-7,9-dimethyl-5-(2-methylbut-3-en-2-yl)-4,6,6a,7,8,9,10,10a-octahydroindolo[4,3-fg]quinolin-7-ium-10-yl] acetate