A compound of the formula: ##STR1## where X is ##STR2## and R is hydroxy, or an alkoxy with 0 or 1 hydroxy substituent, or aroxy with 0 or 1 hydroxy substituent, or alkoxy monosubstituted phenoxy, or NR.sup.1 R.sup.2 where R.sup.1 is hydrogen, or an alkyl or aryl with 0 or 1 hydroxy substituent, and R.sup.2 is an alkyl or aryl with 0 or 1 hydroxy substituent. These compounds are useful as chemopreventive agents for inhibiting tumor promotion in ephithelial cells and for treating nonmalignant skin disorders.
化合物的
化学式为:##STR1## 其中X为##STR2##,R为羟基,或带有0或1个羟基取代基的烷氧基,或带有0或1个羟基取代基的芳氧基,或烷氧基单取代的苯氧基,或NR.sup.1 R.sup.2,其中R.sup.1为氢,或带有0或1个羟基取代基的烷基或芳基,R.sup.2为带有0或1个羟基取代基的烷基或芳基。这些化合物可用作
化学预防剂,用于抑制上皮细胞中的肿瘤促进,并用于治疗非恶性皮肤疾病。