<unk>  is a derivative of guanidine.  It is an antihypertensive drug similar to guanethidine.<unk>  is frequently used for phenotyping the CYP2D6 enzyme, a drug metabolizing enzyme.
Debrisoquine
Artemether
Tafenoquine
Amodiaquine
Flumequine
Piperaquine
Chloroquine
Dihydroartemisinin