| abstract |
Embodiments are directed to compounds of the formulae (I), (Ia), (Ib), (II), (IIa) (III), (IV), (V), and (VI); methods for treating cancer with one or more compounds of the formulae (I), (Ia), (Ib), (II), (IIa); (III), (IV), (V), and (VI); and methods for inhibiting a human topoisomerase with one or more compounds of the formulae (I), (Ia), (Ib), (II), (IIa); (III), (IV), (V), and (VI). |