69436-84-6 His-PG Pregn-4-ene-3,20-dione, 11-(4-((2-(1H-imidazol-4-yl)ethyl)amino)-1,4-dioxobutoxy)-, (11alpha)- Progesterone 11-hemisuccinate-(2-iodohistamine) Progesterone-11-hemisuccinate-(2-iodohistamine)