the addition of 12-o-tetradecanoylphorbol-13-acetate ( tpa ) , a phorbol ester and well-known promoter , to the cadmium-containing solutions resulted in the induction of a progressive , potentially lethal , transplantable tumor in a large proportion of the treated flatworms .
C0039654
12-o-tetradecanoylphorbol-13-acetate
C0031586
phorbol ester