the urinary excretion of biopterin and neopterin , pterin compounds related to tetrahydrobiopterin , the cofactor for the initial steps in monoamine synthesis , was serially measured in a heterogeneous group of psychiatric patients and compared to excretion in control subjects , to state of illness , and to the results of the dexamethasone suppression test .
C0005562
biopterin
C0068527
neopterin