Novel phenethyl-5-bromopyridylthiourea (PBT) and dihydroalkoxybenzyloxopyrimidine (DABO) derivatives exhibiting spermicidal activity as well as anti-viral activity. These novel compounds can be incorporated within contraceptive compositions to provide for spermicidal or sperm-immobilizing activity.

Nieuwe phenethyl-5-bromopyridylthiourea (PBT) en dihydroalkoxybenzyloxopyrimidine (DABO) derivaten die spermicidal activiteit evenals anti-viral activiteit tentoonstellen. Deze nieuwe samenstellingen kunnen binnen contraceptieve samenstellingen worden opgenomen om spermicidal of sperma-immobiliserende activiteit te voorzien.