An aspirator assembly for enabling rapid inflation of evacuation slides and life rafts is configured for direct attachment to the inflatable article. The present invention further relates to a process for the production of Percyquinnin and to the use of Percyquinnin and its pharmaceutically acceptable salts as pharmaceuticals, in particular to their use as inhibitors of lipase. The second spring-receiving slot includes: a second lower wall; a second outer wall; a second locking tab located adjacent the rear face of the shoe. The rotor also includes a plurality of radial slots which receive a like plurality of vanes.