A highly photostable, broad spectrum sunscreen composition having an SPF of greater than 50 that retains about 90% of its UV absorbance over the range of 290 nm to 400 nm after being irradiated with 15 MEDs of energy from a simulated solar radiation source calibrated in accordance with the COLIPA standard. The invention also relates to pharmaceutical compositions comprising said derivatives, as well as to the use of these spiro2H-1-benzopyran-2,4-piperidine derivatives in therapy, more specifically for the treatment of CNS disorders. Method for selecting compounds capable of modulating the viral infection are further provided. Such information may be transmitted to the user via a short message service or a wireless application protocol. When a signal supposed to pass through the first LPF section is input to the input terminal, the switch circuit is activated to change the HPF or the BPF section to the rejection band for blocking a second harmonics component from passing through the HPF or the BPF section. A change in the direction of rotation to a second direction of rotation of the electric drive unit, with the retaining mechanism released, gives rise to automatic separation of the pump-housing portion with the stator by virtue of the rotor being unscrewed.