1-(piperidinomethyl)-3[3'-(4''-pyridyl)-5'-mercapto-1',2',4'-triazol-2'-yl]iminoisatin 1-(piperidinomethyl)-3[3'-(4-pyridyl)-5'-mercapto-1',2',4'-triazol-2'-yl]iminoisatin AIDS-064185 AIDS064185