13-Hydroxy-8,14,19-trimethoxy-4,10,12,16-tetramethyl-3,20,22-trioxo-21-((1-piperidinylimino)methyl)-2-azabicyclo[16.3.1]docosa-1(21),4,6,10,18-pentaen-9-yl carbamate 19-Formylgeldanamycin N-piperidinoimine 19-Formylgeldanamycin-N', N'-pentamethylenehydrazone 65764-44-5 AIDS-128292 AIDS128292 NSC255111