accumulations of 5-hydroxytryptophan ( 5htp ) and l-dihydroxyphenylalanine ( l-dopa ) following decarboxylase inhibition as indices for 5-hydroxytryptamine ( 5ht ) and catecholamine ( dopamine and/or norepinephrine ) synthesis , respectively , were both increased in the preoptic area-anterior hypothalamus ( poa-ah ) of ovariectomized rats treated with a combination of 17 beta-estradiol benzoate ( e2 ) and progesterone ( p ) .
C0007412
catecholamine
C0028351
norepinephrine