Omega-3-acid ethyl esters
Omega-3-acid ethyl esters are a mixture of ethyl eicosapentaenoate and ethyl docosahexaenoate, which are ethyl esters of the omega−3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) found in fish oil. Together with dietary changes, they are used to treat high blood triglycerides which may reduce the risk of pancreatitis.
Source: Wikipedia — Omega-3-acid ethyl esters (CC BY-SA 4.0)