An integrated circuit programmable resistor or programmable capacitor has a floating gate memory cell connected either in series or in parallel to a fixed resistor or a fixed capacitor. The benefit of the present invention rises inter alia from the fact that a major intermediate involved in the synthesis of the above compounds may be isolated from a mixture containing also an undesired isomer, by crystallization. Recessed regions are formed in active regions of a semiconductor device after formation of gate structures according to the selected strain profile. Optical energy is coupled between the D-fibers depending upon the magnitude of the voltage applied to the electrodes. The compounds and compositions are useful as analgesics. 05 eV less than the oxidation potential of said reactant, thereby precluding one-electron oxidation of said reactant.