Wandering Sasquatch

According to an FDA briefing on the Moderna Vaccine (mRNA-1273), whose link can be found below, one of the vaccine's ingredients is 1,2-distearoyl-snglycero-3-phosphocholine [DSPC]. My research tells me DSPC is a phospholipid found in cell membranes and used in the creation of nanoparticles. I want to know where/from what the DSPC is derived from. A straightforward answer or a reference to a source with that information would be much appreciated. https://www.fda.gov/media/144434/download Page 11, Paragraph 3.