4.2.1.B6 (9Z,11E,13S,15Z)-13-hydroperoxy-9,11,15-octadecatrienoate = (9Z,11Z)-12-[(1E,3Z)-hexa-1,3-dien-1-yloxy]dodeca-9,11-dienoic acid the conversion of 13-hydroperoxides into (11Z)-etheroleic and (11Z)-etherolenic acids by divinyl ether synthase is remarkable in the sense that it involves a thermodynamically unfavorable E/Z isomerization of the DELTA11 double bond 705459 4.2.1.B6 2 (9Z,11E,13S)-13-hydroperoxy-9,11-octadecadienoate = (9Z,11E)-12-[(1Z)-hex-1-en-1-yloxy]dodeca-9,11-dienoic acid + (9Z,11Z)-12-[(1E)-hex-1-en-1-yloxy]dodeca-9,11-dienoic acid + 2 H2O the conversion of 13-hydroperoxides into (11Z)-etheroleic and (11Z)-etherolenic acids by divinyl ether synthase is remarkable in the sense that it involves a thermodynamically unfavorable E/Z isomerization of the DELTA11 double bond 705459