The present invention provides compounds of general formula A useful as potential anticancer agents against human cancer cell lines and apoptosis inducers. A digital identification record is provided on a second part of the product including an encoded digital version of the item identifier, the first and second parts being separable when the product is used. The amplifier adjusts a parameter of the amplifier based on the count of the labeled channels and the spectral distribution of the labeled channels. A suspicious document of the same type as the monitored document is opened and executed by the same corresponding software application. Entry into the column top proceeds through a conventional radially arranged port, to which, however, a special tube construction connects which ensures as smooth as possible non-turbulent flow and its tangential exit into the column top.