1-Butanone, 2-((dimethylamino)methyl)-1-phenyl-, (Z)-2-butenedioate (1:1) (9CI) 2-(Dimethylamino)methylbutyrophenone maleate 53207-31-1 BUTYROPHENONE, 2-(DIMETHYLAMINO)METHYL-, MALEATE NSC 193533 Propiophenone, 3-dimethylamino-2-ethyl-, maleate