Large scale GMP production of high purity Fatty Acid Side Chains for drug modification, including Fmoc-Lys(tBuO-Ste-Glu(AEEA-AEEA)-OtBu)-OH, tBuO-Ste-Glu(AEEA-AEEA-OSU)-OtBu, Ste-Glu-AEEA-AEEA-OSU, and tBuO-Ste-Glu(AEEA-AEEA-OH)-OtBu. These are critical components for enhancing drug delivery and efficacy.