7-cyano-7-deazaguanine biosynthetic process
7-cyano-7-deazaguanine biosynthetic process
The chemical reactions and pathways resulting in the formation of the Q nucleoside precursor 7-cyano-7-deazaguanine, also known as 2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile or preQo.