The present invention relates to a azo dyestuff compound of the following formula, of which the free acid is represented by the following formula:wherein R1, R2, R3, R4, and n are defined as in the specification. The structure has a spherical sleeve slidably mounted on the drive shaft, a journal mounted on an outer surface of the sleeve and inserted in the swash plate, and a pair of pins adapted to connect the journal to the sleeve. The application execution environment may include an operating system, and the operating system may control resources within the application execution environment. The call center may includes operators who have access to a database of subscriber information. The second movable contact is located around the front end of a slide plate slidably supported on the trigger lever. 7 weight percent of Si-bonded hydrogen, and a linear organopolysiloxane bearing terminal Si\u2014H groups, wherein the mol ratio of silicon-bonded hydrogen in to that in and is from 0.