(all-Z)-6,9,12,15,18-Heneicosapentaenoic Acid N-Succinimide is the succinimide analog of (all-Z)-6,9,12,15,18-Heneicosapentaenoic Acid (H245600), a 21-carbon, ω-3 fatty acid which is a dietary precursor to eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). It is administered in a high dose for pain relief.