Synthetic materials of resolvin D1 (RvD1, 4), resolvin D2 (RvD2, 5), lipoxin A4 (LXA4, 6), lipoxin B4 (LXB4, 7), 5S,12S-diHETE, 10S,17S-diHDHA (8),7S,14S-diHDHA (9) and leukotriene B4 (12) were obtained from Cayman Chemicals, while protectin D1 (2), maresin 1 (MaR1, 3), and PD1n-3DPA (13) were obtained by total synthesis as in ref.18 (link),30 (link),34 4-Phenyl-1,2,4-triazole-3,5-dione (14), dry MeOH and CH2Cl2 were all purchased from Sigma-Aldrich.