(CAS NO.: ), with other name of 2-(beta-D-Ribofuranosyl)-4-amino-1,3,5-triazin-2-one, could be produced through many synthetic methods.

Following is one of the synthesis routes:

1,2,3,5-Tetra-O-acetyl-beta-D-ribofuranose (I) could react with dry HCl in ether-acetic anhydride to produce 1-chloro-2,3,5-tri-O-acetyl-beta-D-ribofuranose (II), and the yielding product by reaction with silver isocyanate in dry xylene is converted into 2,3,5-tri-O-acetyl-beta-D-ribofuranosylisocyanate (III). The reaction of (III) with 2-methylisourea (IV) in dry CHCl₃ affords 1-(2,3,5-tri-O-acetyl-3-D-ribofuranosyl)-4-methylisobiuret (V), which is cyclized by reaction with ethyl orthoformate at 135 C yielding 1-(2,3,5-tri-O-acetyl-beta-D-ribofuranosyl)-4-methoxy-2-oxo-1,2-dihydro-1,3,5-triazine (VI). At last, this compound is treated with ammonia in dry methanol.