Novel compounds having the structural formula: ##STR1## wherein R.sub.1 is hydrogen and R.sub.2 is alkyl, alkenyl, cycloalkyl, 2-furyl, 2-thienyl, aryl, aralkyl, aralkenyl, wherein the aromatic ring may be substituted by hydroxy, alkyl, alkoxy, halogen, amine, or nitro; or R.sub.1 and R.sub.2 are each and alkyl radical, or R.sub.1 and R.sub.2, together with the carbon atom to which they are attached, are a saturated cycloaliphatic ring, their methods of preparation, and the use of these new compounds as anti-cancer agents.
新化合物具有以下结构式:##STR1## 其中R.sub.1为氢,R.sub.2为烷基,烯基,环烷基,2-
呋喃基,2-
噻吩基,芳基,芳基烷基,芳基烯基,其中芳环可以被羟基,烷基,烷氧基,卤素,胺或硝基取代;或者R.sub.1和R.sub.2分别为烷基基团,或者R.sub.1和R.sub.2与它们附着的碳原子一起是饱和环烷基环,其制备方法以及将这些新化合物用作抗癌剂的用途。