I don’t know what “S D 168 I O CORP” is. I can’t find any record of that “corporation” doing anything other than buying this house. However, the grantor/grantee index contains mentions of “S D 120 LLC”, “S D 132 LTD”, “S D 109 INC”, and even “S D 225 RPF III LLC”.
Edit: there is a business entity called “San Diego Lodge No. 168, Benevolent and Protective Order of Elks of the United States of America”. Registered since 1953. Contrary to what you might think, it does not have anything to do with elks, deer, or moose; apparently it’s a fraternal order similar to freemasons, and “Elks” stands for “Exalted leading knights”. Wow. Did they buy the house in La Jolla, or is it just a coincidence?