The present invention relates to novel estrogen-related steroidal quinols and their use as prodrugs for phenolic estrogens and estrogen analogs. When a request for the domain name is received, a wake-up signal is sent to the server for switching the server to a normal mode, and an IP address corresponding to the server name is then assigned in response to the inquiry request. The present invention also provides a diagnostic kit for determining the amount of early pregnancy associated hCG is a sample. The oxygen-enriched gas can be stored in a buffer tank and prioritized so as to supply a patient with a proper amount and concentration of oxygen and secondarily to supply an amount of the enriched oxygen to a compressor. The invention also provides compositions comprising the compounds of the present invention and methods of utilizing those compositions for treating or preventing neuronal damage.