Methods and systems for processing touch inputs are disclosed. The gate structure may have a low sheet resistance and desired thermal stability. The imaged data setting on the display is returned from its enlarged size to its normal size when user manipulation of the control has ceased, preferably a predetermined time interval after such user manipulation has ceased. In comparison to the more structurally complex ellagitannins, the compounds of this invention are structurally simpler, easier to synthesize, and more potent. The compositions are useful for chemoembolization, particularly for loco regional treatment of tumors.