“…1 ). Strictosidine aglycones are the precursors of heteroyohimbane and yohimbane alkaloids such as the antihypertensive ajmalicine [ [36] , [37] , [38] , [39] , [40] ]. Geissoschizine is the precursor of sarpagane alkaloids such as the antiarrhythmic ajmaline [ 41 , 42 ].…”