preferred_name: dehydroprobetaenone I + AH2 <=> probetaenone I + A
preferred_name_lc: dehydroprobetaenone i + ah2 <=> probetaenone i + a
label: dehydroprobetaenone I + AH2 <=> probetaenone I + A
label_lc: dehydroprobetaenone i + ah2 <=> probetaenone i + a