preferred_name: 3-dehydro-L-erythronate => 2-dehydro-L-erythronate
preferred_name_lc: 3-dehydro-l-erythronate => 2-dehydro-l-erythronate
label: 3-dehydro-L-erythronate => 2-dehydro-L-erythronate
label_lc: 3-dehydro-l-erythronate => 2-dehydro-l-erythronate