although several structurally unrelated compounds were inhibitory to both alga species , even at an initial concentration of 1.0 mg/liter , methylthio-s-triazines , ametryne , prometryne , and terbutryne , at 0.1 mg/liter , restricted growth to less than 25 % of control ( untreated ) cultures .
C0040877
triazines
C0033407
prometryne