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