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