167683-61-6 AIDS-033457 AIDS033457 N-[2-(2-Chloro-3-ethoxy-6-fluorophenethyl)]-N'-[2-(5-bromopyridyl)]thiourea PETT deriv. Thiourea, N-(5-bromo-2-pyridinyl)-N'-[2-(2-chloro-3-ethoxy-6-fluorophenyl)ethyl]-