1,3,16-alpha-Trihydroxyestra-1,3,5(10)-trien-17-one 1,3-diacetate 4233-93-6 BRN 2188989 ESTRA-1,3,5(10)-TRIEN-17-ONE, 1,3,16-alpha-TRIHYDROXY-, 1,3-DIACETATE