O.[NH2:2][C@H:3]([C:9]([O-:11])=[O:10])[CH2:4][CH2:5][CH2:6][CH2:7][NH2:8].[NH2:12][C@H:13]([C:19]([O-:21])=[O:20])[CH2:14][CH2:15][CH2:16][CH2:17][NH2:18].[Ca+2:22]>CO>[NH2:2][C@H:3]([C:9]([O-:11])=[O:10])[CH2:4][CH2:5][CH2:6][CH2:7][NH2:8].[NH2:12][C@H:13]([C:19]([O-:21])=[O:20])[CH2:14][CH2:15][CH2:16][CH2:17][NH2:18].[Ca+2:22]A stirred solution of calcium bis-lysinate monohydrate (1.92 g, 5.0 mmol) in methanol (10 mL) was treated with a solution of EPA (1.55 g, 5.125 mmol) in methanol (10 mL) and stirred for 15 min, then concentrated in vacuo to a pale yellow foam. The above foam was triturated from acetonitrile (20 mL) and dried in vacuo to afford 3.26 g (97%) of subject material as a pale yellow powder.
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