This invention is directed to indolone derivatives which are selective antagonists for the GalR3 receptor. Embodiments of the present disclosure improve upon existing photodynamic therapy methods and compete with more invasive oncology procedures by providing deeper light penetration within the human body, giving medical personnel the ability to treat forms of cancer previously untreatable with existing photodynamic therapies, and with less damage to healthy tissue than current procedures. The set point reference value is varied as a function of time, preferably according to a set point waveform that oscillates around an average set point. Following the heating process, pertinent information within the character box is then scanned without the character box. The converted PID of a first packet is converted to the original PID. The central recess has, in the chip space area, a non-circular cross-section and is situated at a maximum distance from the rod center axis, said maximum distance being at least as large as the minimum distance .