A compound of the formula I ##STR1## in which R.sub.2 is an optionally substituted 4-piperidinyl bonded via oxy or imino, or an optionally substituted 2-(piperidino)-ethoxy, n is 1 or 2, R.sub.7 and R.sub.8 are hydrocarbon radicals, R.sub.9 is hydrogen or methyl, R.sub.14 is cyano, --CH.sub.2 OH, a hydroxymethyl which is C-substituted by an optionally substituted 4-piperidinyl bonded via oxy or imino, or by an optionally substituted 2-(piperidino)-ethoxy, or R.sub.14 is also acyl or nitro, and, when n=1, R.sub.15 is hydrogen, a substituted hydroxybenzyl, an optionally substituted hydrocarbon radical, an optionally substituted 4-piperidinyl, or alkylene which is optionally linked to R.sub.14 and optionally substituted, or, when n=2, R.sub.15 is a direct bond or an optionally interrupted hydrocarbon radical, and its salts as stabilizers for organic material.
化合物的式子为I ##STR1## 其中 R.sub.2 是通过氧或
亚胺键结合的可选取代的4-
哌啶基或可选取代的2-(
哌啶基)乙氧基,n为1或2,R.sub.7和R.sub.8是碳氢基,R.sub.9是氢或甲基,R.sub.14是
氰基,--CH.sub.2 OH,被可选取代的4-
哌啶基通过氧或
亚胺键结合的羟甲基,或被可选取代的2-(
哌啶基)乙氧基取代的羟甲基,或R.sub.14也可以是酰基或硝基。当n=1时,R.sub.15是氢,取代的羟基苯甲基,可选取代的碳氢基,可选取代的4-
哌啶基,或与R.sub.14可选连接和可选取代的烷基,当n=2时,R.sub.15是直接键或可选中断的碳氢基,以及其作为有机物材料稳定剂的盐。