1860-84-0 4-Amino-1-(4-amino-2-oxo-(2H)-pyrimidinyl)-1,2,3,4-tetradeoxy-beta-D-erythro-hex-2-enopyranuronic acid Cytosinine beta-D-erythro-Hex-2-enopyranuronic acid, 4-amino-1-(4-amino-2-oxo-(2H)-pyrimidinyl)-1,2,3,4-tetradeoxy-