AIDS-051047 AIDS051047 NSC666170 Spiro[9H-fluorene-9,6'(5'H)-[1,2,4]triazin]-5'-one, 3'-[(5Z)-5-[(4-chlorophenyl)methylene]-5,6-dihydro-6-oxo-3-phenyl-1,2,4-triazin-2(1H)-yl]-1',4'-dihydro-