The invention provides a compound of formula or a pharmaceutically acceptable ester, amide, carbamate, solvate or salt thereof, including a salt of such an ester, amide or carbamate, and a solvate of such an ester, amide, carbamate or salt. In some embodiments, the storage controller is coupled to a flash memory module having multiple flash memory groups, each flash memory group corresponding to a distinct flash port in the storage controller, each flash port comprising an associated processor. A lower-bandgap dielectric layer is disposed between the high voltage node and the main dielectric.