(3,16alpha-Dihydroxyestra-1,3,5(10)-trien-17beta-yl)(methyl)ammonium hydrogen maleate 80177-51-1 EINECS 279-413-5 Estra-1,3,5(10)-triene-3,16-diol, 17-(methylamino)-, (16alpha,17beta)-, (Z)-2-butenedioate (1:1) (salt) Org 7797