Rutecarpine84-26-4100 % similar 1,2,3,4-Tetrahydrocarbazole942-01-836 % similar 3,4-Dihydro-3-hydroxy-4-oxo-1,2,3-benzotriazine28230-32-232 % similar Quinacridone1047-16-131 % similar 2-Methyltryptamine2731-06-831 % similar Ketanserin74050-98-930 % similar