Patents by Inventor Riki Goto

Riki Goto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • (2-heteroarylamino) succinic acid derivatives
    Patent number: 9206168
    Abstract: The present invention provides a compound which enhances the production of erythropoietin. The present invention provides a compound represented by the formula (1) wherein R1: an aromatic hydrocarbon ring group or an aromatic heterocyclic group; R2: a hydrogen atom, an alkyl group, or a heterocycloalkyl group; R3: a hydrogen atom or an alkyl group; A: a hydrogen atom or a hydroxy group; L: —NHCO— or —OCH2—; and X: a nitrogen atom or ?CH—.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: December 8, 2015
    Assignee: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Tatsuya Nishi, Naoki Tanaka, Ryoko Kitazawa, Riki Goto, Takashi Ishiyama
  • (2-HETEROARYLAMINO) SUCCINIC ACID DERIVATIVES
    Publication number: 20150011574
    Abstract: The present invention provides a compound which enhances the production of erythropoietin. The present invention provides a compound represented by the formula (1) wherein R1: an aromatic hydrocarbon ring group or an aromatic heterocyclic group; R2: a hydrogen atom, an alkyl group, or a heterocycloalkyl group; R3: a hydrogen atom or an alkyl group; A: a hydrogen atom or a hydroxy group; L: —NHCO— or —OCH2—; and X: a nitrogen atom or ?CH—.
    Type: Application
    Filed: September 24, 2014
    Publication date: January 8, 2015
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Tatsuya NISHI, Naoki TANAKA, Ryoko KITAZAWA, Riki GOTO, Takashi ISHIYAMA
  • 5-hydroxypyrimidine-4-carboxamide derivative
    Patent number: 8785462
    Abstract: The present invention provides a compound which enhances the production of erythropoietin. The present invention provides a compound represented by formula (1): [wherein, R1: formula (1A): [wherein, R4 and R5: H, halogen, or alkyl; R6: H, halogen, alkyl, or the like; R7: substitutable hydroxyalkyl, substitutable hydroxyhalo alkyl, substitutable alkoxyalkyl, or the like; substituent group ?: oxo, hydroxy, amino, or the like; ring Q1: a monocyclic heterocyclic group; ring Q2: a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic group; ring Q3: a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic group; X: a single bond, methylene, ethylene, or the like]; R2: alkyl, or methylsulfanyl; and R3: H, or methyl], or the like.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: July 22, 2014
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Takeshi Kuribayashi, Hideki Kubota, Naoki Tanaka, Takeshi Fukuda, Takashi Tsuji, Riki Goto
  • 5-HYDROXYPYRIMIDINE-4-CARBOXAMIDE DERIVATIVE
    Publication number: 20120220609
    Abstract: The present invention provides a compound which enhances the production of erythropoietin. The present invention provides a compound represented by formula (1): [wherein, R1: formula (1A): [wherein, R4 and R5: H, halogen, or alkyl; R6: H, halogen, alkyl, or the like; R7: substitutable hydroxyalkyl, substitutable hydroxyhalo alkyl, substitutable alkoxyalkyl, or the like; substituent group ?: oxo, hydroxy, amino, or the like; ring Q1: a monocyclic heterocyclic group; ring Q2: a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic group; ring Q3: a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic group; X: a single bond, methylene, ethylene, or the like]; R2: alkyl, or methylsulfanyl; and R3: H, or methyl], or the like.
    Type: Application
    Filed: October 20, 2010
    Publication date: August 30, 2012
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Takeshi Kuribayashi, Hideki Kubota, Naoki Tanaka, Takeshi Fukuda, Takashi Tsuji, Riki Goto