the phorbol esters , phorbol 12,13-dibutyrate ( pdbu ) , phorbol 12,13-diacetate ( pda ) and phorbol 12-myristate 13-acetate ( pma ) , relaxed tissues precontracted by submaximal concentrations of carbachol , histamine or substance p .
C0031586
phorbol esters
C0039654
phorbol