A coaxial cable connector includes: a pair of first crimp pieces; and a pair of second crimp pieces. The compounds are useful as protein kinase inhibitors, especially as inhibitors of Aurora-2 and GSK-3, for treating diseases such as cancer, diabetes and Alzheimer’s disease. The source gas is preferably an organometallic compound. Each reference terminal is connected to a reference point other than the neutral terminal, and each block comprises elements for permanently maintaining at a constant or null sign the difference of potential between the first input terminal and the reference terminal. The connecting member may be solder and have a spherical shape.