1-(2-((4-(Diethylamino)phenyl)ethynyl)phenoxy)-3-(t-butylamino)-2-propanol fumarate 126661-24-3 2-Propanol, 1-(2-((4-(diethylamino)phenyl)ethynyl)phenoxy)-3-((1,1-dimethyl)ethyl)amino-, (E)-2-butenedioate (1:1)