[Antiaggregatory and anticoagulant effects of oligoamines. 12. Alkyl- and arylalkyl- derivatives of putrescine, spermidine and spermine].

Eleven lipophilic derivatives of the title biogenic amines and 28 structurally related triamines and tetramines have been synthesized. Twenty-three of them inhibited the platelet aggregation induced by collagen at an IC50 between 8 mumol/L and 30 mumol/L. Five compounds prolonged the one stage thromboplastin time (Quick) by 7s or more at 100 mumol/L. The antiplatelet and anticoagulant effect do not run parallel. The relationship between the effects observed and the chemical structure of the oligoamines has been elucidated.