(5S,8E,10E,12R,16E,18R)-5,12,18-Trihydroxy-8,10,16-Elcosatriene-6,14-diynoic Acid 1-Methylethyl Ester is an intermediate in the synthesis of Resolvin E1 (R144690), an omega-3 polyunsaturated fatty acid derivative that exhibits potent anti-inflammatory, pro-resolution, and anti-nociceptive effects.