preferred_name: (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin = (6R)-L-erythro-6,7-dihydrobiopterin + H2O
preferred_name_lc: (4as,6r)-4a-hydroxy-l-erythro-5,6,7,8-tetrahydrobiopterin = (6r)-l-erythro-6,7-dihydrobiopterin + h2o
label: "4alpha-hydroxy-tetrahydropterin dehydratase"
label_lc: "4alpha-hydroxy-tetrahydropterin dehydratase"