label: (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-phenylalanine + O2 = (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tyrosine
label_lc: (6r)-l-erythro-5,6,7,8-tetrahydrobiopterin + l-phenylalanine + o2 = (4as,6r)-4a-hydroxy-l-erythro-5,6,7,8-tetrahydrobiopterin + l-tyrosine