181305-20-4 AIDS-033452 AIDS033452 N-[2-(3-Cyano-2,6-difluorophenethyl)]-N'-[2-(5-chloropyridyl)]thiourea PETT deriv. Thiourea, N-(5-chloro-2-pyridinyl)-N'-[2-(3-cyano-2,6-difluorophenyl)ethyl]-