(3R)-hydroxy-(7Z,10Z,13Z,16Z)-docosatetraenoyl-CoA => (2E,7Z,10Z,13Z,16Z)-docosapentaenoyl-CoA + H2O
(3r)-hydroxy-(7z,10z,13z,16z)-docosatetraenoyl-coa => (2e,7z,10z,13z,16z)-docosapentaenoyl-coa + h2o