Abstract: A nerve regeneration which comprises a compound is represented by formula (I): (wherein all symbols are shown in the description), a salt thereof or a prodrug thereof. The compound of the present invention is suppresses nerve cell death as a substance for accelerating growth and/or differentiation of stem cells (nerve stem cells, embryonic stem cells, bone marrow cells, etc.), a substance for accelerating growth and/or differentiation of nerve precursor cells, a potentiator for neurotrophic factor activity, a neurotrophic factor-like substance or a neurodegenerative suppressor, and accelerates repair and regeneration of nerve tissues by neogenesis, regeneration and/or axon evolution. In addition, the compound of the present invention is useful for preparation from brain tissues, bone marrow and/or embryonic stem cells of cells for transplant (nerve stem cells, nerve precursor cells, nerve cells, etc.

Abstract: The present invention relates to a compound represented by formula (I) wherein R1 represents optionally protected hydroxy or oxo, indicates ?-configuration, ?-configuration or a mixture of these in an arbitrary proportion, n represents an integer of 1 to 3, and m represents 0 or an integer of 1 to 10; and wherein two or more R1's are not bound to the same carbon atom other than the terminal carbon atom, a salt thereof or a prodrug thereof. The compounds represented by formula (I) have an ability to improve astrocyte function, and they are useful as a preventive and/or therapeutic agent for a brain infarction, neuronal dysfunction by brain infarction, Parkinson's disease, Parkinson's syndrome, amyotrophic lateral sclerosis or Alzheimer's disease.

Abstract: The present invention relates to a compound represented by formula (I) wherein R1 represents optionally protected hydroxy or oxo, indicates ?-configuration, ?-configuration or a mixture of these in an arbitary proportion, n represents an integer of 1 to 3, and m represents 0 or an integer of 1 to 10; and wherein two or more R1's are not bound to the same carbon atom other than the terminal carbon atom, a salt thereof or a prodrug thereof. The compounds represented by formula (I) have an ability to improve astrocyte function, and they are useful as a preventive and/or therapeutic agent for a brain infarction, neuronal dysfunction by brain infarction, Parkinson's disease, Parkinson's syndrome, amyotrophic lateral sclerosis or Alzheimer's disease.

Abstract: A nerve regeneration which comprises a compound is represented by formula (I): (wherein all symbols are shown in the description), a salt thereof or a prodrug thereof. The compound of the present invention is suppresses nerve cell death as a substance for accelerating growth and/or differentiation of stem cells (nerve stem cells, embryonic stem cells, bone marrow cells, etc.), a substance for accelerating growth and/or differentiation of nerve precursor cells, a potentiator for neurotrophic factor activity, a neurotrophic factor-like substance or a neurodegenerative suppressor, and accelerates repair and regeneration of nerve tissues by neogenesis, regeneration and/or axon evolution. In addition, the compound of the present invention is useful for preparation from brain tissues, bone marrow and/or embryonic stem cells of cells for transplant (nerve stem cells, nerve precursor cells, nerve cells, etc.