The present invention relates to a compound of structural formula and its derivatives for use as medicinal drugs. The process includes forming a layer of a molten photopolymerizable material onto a support; and applying the particulate material onto an exterior surface of the photopolymerizable layer opposite the support within 48 hours of forming the layer of photopolymerizable material. The pick has a body intermediate a shank and an impact tip, the shank being disposed in the central bore of the holder and the body extending from the opening of the bore. To reduce such data reporting, a trace of GPS fixes is approximated by a selection of representative GPS fixes. The invention also relates to a method for retrofitting of an electrolyser comprising the replacement of an existing insulating base with a new base element having integrated probes for measuring voltage. The black matrix layer covers the first pixel and the second pixel.