The present invention relates to a pharmaceutical composition comprising as an active ingredient a compound of formula, wherein Ring A is an aromatic or a heterocyclic ring; Q is a bond, carbonyl, lower alkylene, lower alkenylene, \u2014O\u2014 –, etc. The introducer has a trigger wire catheter and four trigger wires and each trigger wire extending in a loop from the trigger wire catheter. The URB can have parameters that can be utilized to generate a transaction over a wireless network providing Quality of Service guarantees. The devices each include a beaded matrix and a housing.