1-Piperazineethanol, 4-(diphenylacetyl)-alpha-((5-quinolinyloxy)methyl)-, (E)-2-butenedioate (2:3) (salt) 158681-49-3 4-(Diphenylacetyl)-alpha-((5-quinolinyloxy)methyl)-1-piperazineethanol (E)-2-butenedioate (2:3) (salt) MS 209 MS-29