181305-40-8 AIDS-033420 AIDS033420 N-[2-(2,3-Difluoro-6-ethoxyphenethyl)]-N'-[2-(5-bromopyridyl)]thiourea PETT deriv. Thiourea, N-(5-bromo-2-pyridinyl)-N'-[2-(6-ethoxy-2,3-difluorophenyl)ethyl]-