This invention provides new tetrahydrocarbazole derivatives that act as ligands for G-protein-coupled receptors, especially as antagonists of the gonadotropin-releasing hormone. The coils being formed from at least an electric wire and the core having a longitudinal axis. The material unloading system includes a product outlet line adapted to communicate with the product discharge section. A method of fabricating a transistor device is also provided. All the remaining active appliances in the system evaluate said messages and send such messages themselves as long as said appliances are active.