1-(4-(Dimethylamino)-2-butynyl)-1,3,3-trimethylurea oxalate (1:1) 3854-09-9 N-(4-Dimethylaminobut-2-ynyl)-N,N',N'-trimethylurea hydrogen oxalate Urea, (4-(dimethylamino)-2-butynyl)trimethyl-, ethanedioate (1:1) Urea, 1-(4-(dimethylamino)-2-butynyl)-1,3,3-trimethyl-, oxalate (1:1)