preferred_name: (S)-xanthopterin-B2 + NH4(+) => L-sepiapterin + H2O + H(+)
preferred_name_lc: (s)-xanthopterin-b2 + nh4(+) => l-sepiapterin + h2o + h(+)
label: (S)-xanthopterin-B2 + NH4(+) => L-sepiapterin + H2O + H(+)
label_lc: (s)-xanthopterin-b2 + nh4(+) => l-sepiapterin + h2o + h(+)