The herbs of Hedyotis diffusa.

FITC-Dextran (MW 10000) is a marker consisting of coupling fluorescein-isothiocyanate to dextran (10 kDa).

(R)-Nepicastat HCl, the R-enantiomer of Nepicastat HCl, is a potent and selective inhibitor with IC50 of 25.1 nM and 18.3 nM for bovine and human dopamine-β-hydroxylase, with negligible affinity for twelve other enzymes and thirteen neurotransmitter receptors.