Compounds of formula (I) in which (a) four of the radicals R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are hydrogen and the others independently of one another are in each case C.sub.1 -C.sub.2 alkyl, these groups being bonded to the same carbon atom or to two different carbon atoms, or (b) five of the radicals R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are hydrogen and the other radical is C.sub.1 -C.sub.2 alkyl or hydroxymethyl, or salts thereof, are described. The compounds of formula (I) and their salts are ornithine decarboxylase inhibitors.
化学式(I)中的化合物,其中(a)R.sub.1、R.sub.2、R.sub.3、R.sub.4、R.sub.5和R.sub.6中的四个基团为氢,其余基团独立地分别为每种情况下为C.sub.1-C.sub.2烷基,这些基团与同一碳原子或两个不同的碳原子结合,或者(b)R.sub.1、R.sub.2、R.sub.3、R.sub.4、R.sub.5和R.sub.6中的五个基团为氢,另一个基团为C.sub.1-C.sub.2烷基或羟甲基,或其盐。这些化合物的
化学式(I)及其盐是
鸟氨酸脱羧酶
抑制剂。