"sepiapterin reductase (L-erythro-7,8-dihydrobiopterin forming)"
"sepiapterin reductase (l-erythro-7,8-dihydrobiopterin forming)"
"sepiapterin reductase (L-erythro-7,8-dihydrobiopterin forming)"
"sepiapterin reductase (l-erythro-7,8-dihydrobiopterin forming)"