(a)
(b)
(c)
Figure 7: Mass spectra of NAEs generated by GC-MS with positive EI in scan mode. (a) N-Palmitoylethanolamine (PEA). (b) N-Stearoylethanolamine (SEA). (c) N-Arachidonoylethanolamide (AEA). (Left column represents authentic, purified compounds; right column represents the same compounds identified in retinal tissue extracts.)