Compounds represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or a protective group for a hydroxyl group, or R.sub.1 and R.sub.2 combine to represent a protective group for hydroxyl groups, and R.sub.3 represents CH.sub.3 O-- or CH.sub.3 NH--. These compounds exhibit a strong effect to inhibit proliferation of cancer cells and are expected to be used as a carcinostatic agent.
N-methyldeacetylcolchiceinamide derivatives represented by the formula
wherein R denotes a residue obtained by removing COOH from a C₃-C₇ sugar carboxylic acid, and hydroxyl groups present in the residue may be protected with a protecting group, and salts thereof have low toxicity and inhibit the proliferation of tumor cells.
N-甲基脱乙酰基儿茶酰胺衍生物,其代表式为
其中 R 表示通过从 C₃-C₇ 糖羧酸中去除 COOH 而得到的残基,残基中存在的羟基可以用保护基保护,其盐具有低毒性并能抑制肿瘤细胞的增殖。