a 12'-apo-carotenal + 2-cis,4-trans-xanthoxin => a 9-cis-epoxycarotenoid + O2
a 12'-apo-carotenal + 2-cis,4-trans-xanthoxin => a 9-cis-epoxycarotenoid + o2
a 12'-apo-carotenal + 2-cis,4-trans-xanthoxin => a 9-cis-epoxycarotenoid + O2
a 12'-apo-carotenal + 2-cis,4-trans-xanthoxin => a 9-cis-epoxycarotenoid + o2