A cyclic azine compound represented by general formula :wherein each Ar1 represents an aromatic group, which is unsubstituted or substituted by a C1-4 alkyl group, a phenyl group or a pyridyl group; and A represents a group selected from those which are represented by general formulae to, described in the description. In the region of the break in the die seal ring, the doping is modified so that the impedance of the electrical path across the break through the substrate is increased. The invention includes the manufacture of a clinically used substance for the treatment of human cancers. At least one of the platforms may include a bridging portion to bridge a gap between the platforms during, for example, loading and unloading of the amusement apparatus with riders. Trickplay view files for rendering particular trickplay view rates are then generated from the trickplay source file. Certain such methods and systems provide the additional function of compensating for a sample volume determined to be less than adequate in order to proceed with an accurate analyte concentration measurement.