label: 1-O-methyl-(9Z,12Z)-octadecadienoate + O2 <=> 1-O-methyl-(13S)-hydroperoxy-(9Z,11E)-octadecadienoate
label_lc: 1-o-methyl-(9z,12z)-octadecadienoate + o2 <=> 1-o-methyl-(13s)-hydroperoxy-(9z,11e)-octadecadienoate