The present invention discloses the compound of Formula I and pharmaceutically acceptable salts and solvates thereof. The plate is one of a plurality of partially overlapping protective plates that slide and turn relative to each other as the bellows is extended and compressed. The semiconductor chip also includes at least an interconnection metal layer, at least a second via plug between the interconnection metal layer and the bonding pad structure, and an active circuit situated underneath the bonding pad structure on a semiconductor bottom. The retrieval assembly includes a plurality of legs. In a second aspect the invention provides neuroactive steroids in combination with a Liver X Receptor ligand to effect treatment of a nervous system condition. The invention also proposes a corresponding method and a computer program product.