label: 6-carboxy-5,6,7,8-tetrahydropterin + triphosphate + acetaldehyde + 2 H(+) => 7,8-dihydroneopterin 3'-triphosphate + H2O
label_lc: 6-carboxy-5,6,7,8-tetrahydropterin + triphosphate + acetaldehyde + 2 h(+) => 7,8-dihydroneopterin 3'-triphosphate + h2o