A corrugation bellows for a transfer between two articulated vehicles has a plurality of corrugations which are generally U-shaped in cross-section. The ring can be printed with brand name, specifications or module number. An integral handle is also provided at least in part on the sidewall. The bottom edge of the hook section is provided with a peg hole, and the clipping plate is located between the hook sections, the bottom section of the clipping plate is provided with a peg hole, and a peg body is used to mount the fixing plate, the clipping plate and the spring into an integrated body. 1 atom percent, and rare earth metals that includes neodymium in an amount from about 0. The present invention also relates to a process for their preparation, a pharmaceutical composition containing said derivatives and a method of treating or preventing acute or chronic neurological disorder comprising administering to a patient in need of such treatment a pharmaceutical composition comprising a therapeutically effective amount of at least one such derivatives.