| abstract |
(57) [Summary] (Modifications) [Problem] To provide a novel sheatan derivative different from the conventionally reported sheatan derivative. A sheatan derivative represented by the following chemical formula (1). This derivative can be easily converted artificially into Erinasin A or Erinasin B, which is useful as an NGF production inducer, and is expected as an antitumor agent, a therapeutic agent for senile dementia, and the like. |