1-O-methyl-20-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate + O2 => 1-O-methyl-12-hydroperoxy-20-hydroxy-(5Z,8Z,10E,14Z)-eicosatetraenoate
1-o-methyl-20-hydroxy-(5z,8z,11z,14z)-eicosatetraenoate + o2 => 1-o-methyl-12-hydroperoxy-20-hydroxy-(5z,8z,10e,14z)-eicosatetraenoate