1-(2,3-Anhydro-beta-D-lyxofuranosyl)cytosine 1-(2,3-Anhydrolyxofuranosyl)cytosine 1-Alfc 2(1H)-Pyrimidinone, 4-amino-1-(2,3-anhydro-beta-D-lyxofuranosyl)- 34989-27-0