3,4-Di-O-acetyl-1,6-dideoxy-1,6-bis({[methyl(nitroso)amino]carbonyl}amino)hex-2-ulofuranosyl 2,3,4-tri-O-acetyl-6-deoxy-6-({[methyl(nitroso)amino]carbonyl}amino)hexopyranoside 64021-91-6 AIDS-016968 AIDS016968 NSC263860