label: a C21-steroid + reduced [NADPH--hemoprotein reductase] + O2 => a 17alpha-hydroxy-C21-steroid + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
label_lc: a c21-steroid + reduced [nadph--hemoprotein reductase] + o2 => a 17alpha-hydroxy-c21-steroid + oxidized [nadph--hemoprotein reductase] + h2o + h(+)