(S)-1-(4-(Dimethylamino)-2-butynyl)-5-methyl-2-pyrrolidinone ethanedioate (2:3) (S)-N-(4-(Dimethylamino)-2-butynyl)-5-methyl-2-pyrrolidone sesquioxalate 2-Pyrrolidinone, 1-(4-(dimethylamino)-2-butynyl)-5-methyl-, (S)-, ethanedioate (2:3) 98612-67-0