1867-73-8 6-Methyladenosine 6-Methylaminopurine D-riboside 6-Methylaminopurine ribonucleoside 6-Methylaminopurine riboside 6-Methylaminopurinosine Adenosine, N-methyl- N-Methyladenosine N6-Methyladenosine NSC 29409 NSC29409