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