all-trans-violaxanthin <=> (5R,6S)-5,6-epoxi-capsanthin
all-trans-violaxanthin <=> (5r,6s)-5,6-epoxi-capsanthin
all-trans-violaxanthin <=> (5R,6S)-5,6-epoxi-capsanthin
all-trans-violaxanthin <=> (5r,6s)-5,6-epoxi-capsanthin