| 摘要 |
A novel spiroquinone derivative having a high ABCA1 stabilization effect and being useful for prophylactic and/or therapeutic agents for various diseases developing hypo-high density lipoproteinemia is obtained. The novel spiroquinone derivative is a compound represented by the following formula: wherein R1a, R1b, R1c and R1d each represents a hydrogen atom, a halogen atom, an alkyl group which may have a substituent, or an alkoxy group which may have a substituent, and R2a and R2b each represents a hydrogen atom, or an alkyl group which may have a substituent (e.g., a carboxyl group, an alkoxycarbonyl group, a carbamoyl group, and an N-substituted carbamoyl group), the groups R2a and R2b may bond together to form a hydrocarbon ring with an adjacent carbon atom, provided that compounds in which all of the groups R1a, R1b, R1c and R1d are t-butyl groups, and both of the groups R2a and R2b are hydrogen atoms or both of the groups R2a and R2b are methyl groups are excluded; or a pharmacologically acceptable salt thereof. |
