(8R,9S,13S,14S)-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-2,3,17-trione 40551-33-5 2,3-EQ 2,3-Estrogen o-quinone 2,3-Estrone o-quinone 2,3-Estrone ortho-quinone Estra-1(10),4-diene-2,3,17-trione Estrone-2,3-quinone