Chemical structures of five species of compounds that where initially identified on the basis of inhibition of NTPase-II activity. The compounds are 2-{2-[2-(2,4,5-trichlorophenoxy)ethoxy]ethoxy}acetic acid (compound 1), 9-hydroxy-10-(pentachlorophenoxy)stearic acid (compound 2), urosolic acid (compound 3), 1H-1,2,3-triazole-4-carboxamide, 5-amino-1-({3,5-dichloro-4-[tricyclo(3.3.1.13,7)dec-1-ylcarbony]phenyl}methyl) (compound 4), and 2-phenylthio-indole (compound 5).