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    • 3. 发明授权
    • Anticancer compound, intermediate therefor, and processes for producing these
    • 抗癌化合物,其中间体及其制备方法
    • US07910752B2
    • 2011-03-22
    • US11885216
    • 2006-03-15
    • Harukuni TokudaKatsumi Nishimura
    • Harukuni TokudaKatsumi Nishimura
    • C07D307/92
    • C07D307/92
    • The present invention provides a method for easily and inexpensively preparing a racemate or an optically-active 2-(1 -hydroxyethyl)-5-hydroxynaphtho[2,3-b]furan-4,9-dione in high yields, 2-acetyl-2,3-dihydro-5-hydroxynaphtho[2,3-b]furan-4,9-dione which is useful as an intermediate for preparing NFD, and an anticancer agent comprising 2-(1-hydroxyethyl)-5-hydroxynaphtho[2,3-b]furan-4,9-dione as an active ingredient.Said 2-(1-hydroxyethyl)-5-hydroxynaphtho[2,3-b]furan-4,9-dione is obtained in 4 or 5 steps by using comparatively inexpensive 5 -hydroxynaphthalene-1,4-dione (also referred to as juglone) as a starting material.
    • 本发明提供了一种以高产率容易且廉价地制备外消旋物或光学活性的2-(1-羟基乙基)-5-羟基萘并[2,3-b]呋喃-4,9-二酮的方法,2-乙酰基 -2,3-二氢-5-羟基萘并[2,3-b]呋喃-4,9-二酮,其可用作制备NFD的中间体,以及抗癌剂,其包含2-(1-羟乙基)-5-羟基萘 [2,3-b]呋喃-4,9-二酮作为活性成分。 所述2-(1-羟基乙基)-5-羟基萘并[2,3-b]呋喃-4,9-二酮通过使用相对便宜的5-羟基萘-1,4-二酮(也称为 作为胡桃醇)作为原料。
    • 8. 发明授权
    • Inhibitory effects of synthetic and natural colorants on carcinogenesis
    • 合成和天然着色剂对致癌作用的抑制作用
    • US5935581A
    • 1999-08-10
    • US845166
    • 1997-04-21
    • Govind J. KapadiaHarukuni TokudaTakao KonoshimaMidori TakasakiHoyoku Nishino
    • Govind J. KapadiaHarukuni TokudaTakao KonoshimaMidori TakasakiHoyoku Nishino
    • A61K36/81A61K41/00G01N33/50A61K35/78
    • G01N33/5017
    • The invention relates to a method of determining the effect of betanins on tumor formation in epidermal tissue in mammals which have been exposed to a substance which initiates or promotes tumor formation by sequentially exposing a first group of mammals to a topically applied chemical substance selected from the group consisting of tumor promoters and tumor initiators; providing the first group of mammals with drinking water containing betanins, said betanin having been extracted from beetroot; measuring a percentage of mammals in the first group which exhibit epidermal tumors; and comparing the percentage of mammals in the first group which exhibit epidermal tumors to a percentage of mammals in a second group which exhibit epidermal tumors, said mammals in the second group having been (a) exposed to a chemical substance selected from the group consisting of tumor promoters and tumor initiators and (b) providing with drinking water containing no betanins.
    • 本发明涉及一种确定β-葡聚糖对哺乳动物表皮组织中肿瘤形成的影响的方法,所述方法已暴露于通过将第一组哺乳动物依次暴露于选自下列物质的局部施用的化学物质中来引发或促进肿瘤形成的物质 由肿瘤启动子和肿瘤引发剂组成的组; 向第一组哺乳动物提供含有甜菜碱的饮用水,所述甜菜碱已从甜菜根中提取出来; 测量显示表皮肿瘤的第一组哺乳动物的百分比; 并且将表现出表皮肿瘤的第一组中的哺乳动物的百分比与表现为表皮肿瘤的第二组中的哺乳动物的百分比进行比较,所述第二组中的哺乳动物已经(a)暴露于选自以下的化学物质: 肿瘤启动子和肿瘤引发剂,(b)提供不含甜菜碱的饮用水。