NEW PHYSIOLOGICALLY ACTIVE SUBSTANCE NK34944, ITS PRODUCTION AND USE THEREOF

    公开(公告)号:JP2001046092A

    公开(公告)日:2001-02-20

    申请号:JP22577399

    申请日:1999-08-09

    申请人: NIPPON KAYAKU KK

    摘要: PROBLEM TO BE SOLVED: To produce the subject new physiologically active substance capable of exhibiting inhibiting actions on cell proliferation and useful as a chemotherapeutic agent, etc. for malignant tumors by culturing a microorganism belonging to the genus Streptomyces and having the ability to produce the physiologically active substance NK34944. SOLUTION: This new physiologically active substance NK34944 (salt) is represented by the formula and is capable of exhibiting inhibiting actions on cell proliferation and expected as an anticancer substance used as a chemotherapeutic agent, etc. for malignant tumors. The new physiologically active substance is produced by culturing a microorganism belonging to the genus Streptomyces and having the ability to produce the physiologically active substance NK34944 [e.g. Streptomyces sp. NA34944 (FERM P-17442) strain] in a nutrient culture medium, producing and accumulating the physiologically active substance NK34944 in the cultured product and then collecting the resultant physiologically active substance NK34944.

    NAPHTHOQUINONE DERIVATIVE AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR USING SAME

    公开(公告)号:JP2001013701A

    公开(公告)日:2001-01-19

    申请号:JP18461199

    申请日:1999-06-30

    申请人: KYOCERA MITA CORP

    摘要: PROBLEM TO BE SOLVED: To provide an electron transferring agent having good compatibility with a bonding resin and excellent also in matching with an electric charge generating agent by using a specified naphthoquinone derivative. SOLUTION: A naphthoquinone derivative of the formula is used as an electron transferring agent. In the formula, R1 and R2 are the same or different hydrogen atom and each H or 1-6C alkyl. The naphthoquinone derivative is excellent in electron acceptability, has good compatibility with a bonding resin and is uniformly dispersed in a photosensitive layer. Since the naphthoquinone derivative is excellent in matching with an electric charge generating agent, the injection of electrons from the electric charge generating agent is smoothly carried out. The naphthoquinone derivative exhibits superior electron transferring ability even in a low electric field and is suitable for use as an electron transferring agent. Since the naphthoquinone derivative does not form a charge- transfer complex together with a hole transferring agent, it is appropriately used in a monolayer type photosensitive layer in which an electron transferring agent and a hole transferring agent are used in combination.