A compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently represent a hydrocarbon gp which can be substituted and/or carry a heteroatom, or R.sub.1 and R.sub.2 together represent a hydrocarbon, optionally substituted, forming with the carbon atom to which they are attached, a ring capable of carrying a heteroatom, R.sub.3 represents hydrogen, lower alkyl or aryl, and R.sub.4 and R.sub.5 each independently represent hydrogen or a hydrocarbon group, as well as the acid addition salts thereof. A method of preparing the compounds and the use thereof as an anti-tumor medicine are disclosed.
该化合物的式子为##STR1##其中R.sub.1和R.sub.2各自独立地表示可以被替代和/或携带杂原子的碳氢基团,或者R.sub.1和R.sub.2一起表示一个碳氢基团,可选地被替代,与它们附着的碳原子形成一个能够携带杂原子的环,R.sub.3表示氢、低碳基或芳基,R.sub.4和R.sub.5各自独立地表示氢或碳氢基团,以及它们的酸加成盐。公开了制备该化合物的方法以及作为
抗肿瘤药物的用途。