3-Hydroxyestra-1,3,5(10)-trien-17-one p-nitrobenzoate 41623-27-2 Estra-1,3,5(10)-trien-17-one, 3-[(4-nitrobenzoyl)oxy]- Estra-1,3,5(10)-trien-17-one, 3-hydroxy-, p-nitrobenzoate Estrone, p-nitrobenzoate NSC94683