Agrocin 84 is a 6-N-phosphoramidate of an adenine nucleotide analogue.

WE wish to draw attention to the natural occurrence of an extraordinarily selective antibiotic, agrocin 84, which is a ‘fraudulent’ member (structure I) of the hitherto unreported 6-N-phosphoramidate series of adenine nucleotides (structure II), of which 6-N-AMP (II, R=H) is the first member.