The invention includes compositions comprising selective AKR1C3 inhibitors. A preferred embodiment provides for the intercoupling piping assembly to be used in connection with tubular building structures having a plurality of elongated pipes coupled together to form a coverable structure and a fabric to cover the structure. The apparatus may also include a control circuit coupled to the magnetic sensor and the magnetic sensor. The rear surface is configured to be coextensive with the front end engine components of the vehicle.