phorbol esters , such as 12-o-tetradecanoylphorbol-13-acetate ( tpa ) or phorbol-12,13-dibutyrate ( pdbu ) , are known to activate protein kinase c ( pkc ) , but their role on cultured vsmc stimulated by 5ht has not been defined .
C0031586
phorbol esters
C0039654
12-o-tetradecanoylphorbol-13-acetate