摘要:
Xanthene derivatives represented by the general formula: wherein R 1 is a carboxyl group which may be esterified or amidated; R 2 is a hydrogen atom, a hydroxyl group, or a hydrocarbon group which may be substituted; R 3 and R 4 are the same or different and are a hydroxyl group which may be substituted; R 5 and R 6 are a hydrogen atom or a halogen atom; R 7 is a hydrogen atom, a nitro group, a halogen atom, a hydrocarbon group which may be substituted, a heterocyclic group which may be substituted, or an acyl group which may be substituted; n is an integer of 0 to 2; and Y is an oxygen atom or two hydrogen atoms; and when n is 0, R 2 may be a group represented by the formula: wherein the symbols have the same meanings as defined above, or a salt thereof inhibit a binding of B7-1 to CD28, prevent the B7-1-dependent activation of T cells and inhibit IL-2 production from T cells, thus being used as an immunomodulator such as a graft rejection inhibitor or a pharmaceutical composition for therapeutic treatment of allergy, rheumatoid arthritis, autoimmune disease, nephritis, diabetes mellitus and so on.
摘要翻译:由以下通式表示的呫吨衍生物:其中R 1是可被酯化或酰胺化的羧基; R 2是氢原子,羟基或可被取代的烃基; R 3和R 4相同或不同,为可被取代的羟基; R 5和R 6是氢原子或卤素原子; R 7为氢原子,硝基,卤素原子,可被取代的烃基,可被取代的杂环基或可被取代的酰基; n为0〜2的整数, Y是氧原子或两个氢原子; 当n为0时,R 2可以是由下式表示的基团:其中符号具有与上述相同的含义,或其盐抑制B7-1与CD28的结合,防止B7 -1依赖性激活T细胞并抑制T细胞的IL-2产生,因此被用作免疫调节剂如移植排斥抑制剂或用于治疗过敏,类风湿性关节炎,自身免疫性疾病,肾炎,糖尿病的药物组合物 等等; 以及能够产生一些根据式(I)的化合物的微生物霉菌(Aspergillus terreus)的FL-67283菌株; 以及用于筛选具有抑制或增强CD28与B7-1或其盐的结合活性的化合物的方法,其包括比较(1)当CHO(CHO)时获得的CD28和B7-1-Ig之间的结合量 含有CD28的细胞或其细胞膜级分与可溶性B7-1-Ig接触,(2)当含有CD28或其细胞膜级分的CHO细胞接触时获得的CD28和B7-1-Ig之间的结合量 可溶性B7-1-Ig和试验化合物; 和由CD28-CHO-11(FERM BP-5431)表示的CHO细胞,由B7-1-CHO-22(FERM BP-5430)表示的CHO细胞或由sB7-1-Ig-CHO- 20(FERM BP-5432)。
摘要:
A novel compound of the formula (I): wherein R₁ is optionally esterified or amidated carboxyl; R₂, R₃ and R₄ are the same or different and are hydrogen or alkyl; A is fcrmyl, hydroxyiminomethyl or carboxyl; and X is hydrogen or halogen, or a salt thereof, which is useful as an aromatase inhibitor or an intermediate of its production. Processes for producing the compound of the formula (I) and an aromatase inhibitor containing as an active component the compound of the formula (I) wherein A is formyl and X is hydrogen or, a salt thereof as well as Penicillium funiculosum capable for producing the compound (I) wherein R₁ is carboxyl, R₂, R₃ and R₄ are hydrogen and X is formyl are also disclosed.
摘要:
Xanthene derivatives represented by the general formula: wherein R 1 is a carboxyl group which may be esterified or amidated; R 2 is a hydrogen atom, a hydroxyl group, or a hydrocarbon group which may be substituted; R 3 and R 4 are the same or different and are a hydroxyl group which may be substituted; R 5 and R 6 are a hydrogen atom or a halogen atom; R 7 is a hydrogen atom, a nitro group, a halogen atom, a hydrocarbon group which may be substituted, a heterocyclic group which may be substituted, or an acyl group which may be substituted; n is an integer of 0 to 2; and Y is an oxygen atom or two hydrogen atoms; and when n is 0, R 2 may be a group represented by the formula: wherein the symbols have the same meanings as defined above, or a salt thereof inhibit a binding of B7-1 to CD28, prevent the B7-1-dependent activation of T cells and inhibit IL-2 production from T cells, thus being used as an immunomodulator such as a graft rejection inhibitor or a pharmaceutical composition for therapeutic treatment of allergy, rheumatoid arthritis, autoimmune disease, nephritis, diabetes mellitus and so on.
wherein each R¹, R² and R³ is an aliphatic acyl group, X is an amino acid sequence consisting of 1 to 5 amino acid residues which contain at least one acidic amino acid residue, n is an integer of 0 to 4, provided that when n is 0, X has glutamyl-glycyl at its N-terminal and when n is 1 or 2, the acidic amino acid residue is an acidic amino acid residue other than D-glutamyl, or a salt thereof has an activity of remarkably improving anhematopoiesis and is useful as an immuno-stimulating agent having a leukocyte-increasing activity.
摘要:
This invention provides a novel compound TAN-1813 of the formula (I):
having farnesyltransferase-inhibitory, cell growth-inhibitory, and anti-tumor activities; its production; farnesyltransferase-inhibiting agent; anti-tumor agent; pharmaceutical composition comprising a compound TAN-1813; and a novel microorganism capable of producing said compound.
wherein each of R 1 and R 2 is hydrogen or aliphatic acyl, A is amino which may be protected, X is an amino acid sequence consisting of 1 to 10 amino acid residues which contain at least one amino acid residue having a water-solubility enhancing group, or a salt thereof has an activity of remarkably improving hematopoietic disorder and is useful as an immuno-stimulating agent or an agent for treating thrombocytopenia.
摘要:
A novel compound of the formula (I): wherein R₁ is optionally esterified or amidated carboxyl; R₂, R₃ and R₄ are the same or different and are hydrogen or alkyl; A is fcrmyl, hydroxyiminomethyl or carboxyl; and X is hydrogen or halogen, or a salt thereof, which is useful as an aromatase inhibitor or an intermediate of its production. Processes for producing the compound of the formula (I) and an aromatase inhibitor containing as an active component the compound of the formula (I) wherein A is formyl and X is hydrogen or, a salt thereof as well as Penicillium funiculosum capable for producing the compound (I) wherein R₁ is carboxyl, R₂, R₃ and R₄ are hydrogen and X is formyl are also disclosed.
wherein each of R¹ and R² is hydrogen or an aliphatic acyl group, each of R³ and R⁴ is hydrogen or a protecting group, X is an amino acid sequence consisting of 1 to 10 amino acid residues which may be protected, Y is an amino acid sequence consisting of 1 to 5 amino acids residues which may be protected, bounding at a terminal carboxyl group, or a salt thereof has an activity of remarkably improving hematopoietic disorder and is useful as an immuno-stimulating agent or an agent for treating thrombocytopenia.