7,8-dihydroneopterin 3'-phosphate + H(+) => 7,8-dihydroneopterin 2',3'-cyclic phosphate + H2O
7,8-dihydroneopterin 3'-phosphate + h(+) => 7,8-dihydroneopterin 2',3'-cyclic phosphate + h2o
7,8-dihydroneopterin 3'-phosphate + H(+) => 7,8-dihydroneopterin 2',3'-cyclic phosphate + H2O
7,8-dihydroneopterin 3'-phosphate + h(+) => 7,8-dihydroneopterin 2',3'-cyclic phosphate + h2o