| Literature DB >> 16593042 |
M del C Barrio1, D I Scopes, J B Holtwick, N J Leonard.
Abstract
Syntheses of all five of the singly labeled [(15)N]adenines are now provided. The presence or absence of two-bond (15)N-(1)H spin couplings in their (1)H NMR spectra confirm the location of the isotope in each case. The fragmentation patterns in their mass spectra are indicative of the sequential losses of HCN units and of CH(2)N(2) from adenine upon electron impact.Entities:
Year: 1981 PMID： 16593042 PMCID： PMC319707 DOI： 10.1073/pnas.78.7.3986
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205