(5S)-hydroperoxy-(18S)-hydroxy-(6E,8Z,11Z,14Z,16E)-eicosapentaenoate = (5S,6S)-epoxy-(18S)-hydroxy-(7E,9E,11Z,14Z,16E)-eicosapentaenoate + H2O
(5s)-hydroperoxy-(18s)-hydroxy-(6e,8z,11z,14z,16e)-eicosapentaenoate = (5s,6s)-epoxy-(18s)-hydroxy-(7e,9e,11z,14z,16e)-eicosapentaenoate + h2o