Compounds of formula A - Y - D - E - G - J - Z - L in which D is direct link, a substutited or unsubstituted phenyl or napththyl group or a heterocyclic ring system; and the other variables are as defined in the claims, their salts and compositions relating thereto having activity against mammalian factor Xa are disclosed. The compounds are useful in vitro or in vivo for preventing or treating coagulation disorders.