2-Azabicyclo[16.3.1]docasa-4,6,10,18,21-pentaene- 3,20,23-trione, 13-(3-aminopropionyloxy)-9,13-dihydroxy- 8,14,19-trimethoxy-4,10,12,16-tetramethyl-, 9-carbamate,monohydrochloride 2-Azabicyclo[16.3.1]docosane, geldanamycin deriv. Geldanamycin, 12-(3-aminopropionate)-monohydrochloride NSC661581