-pteroic acid-

—substituted pterin —>-Figure 1 Structural formula of tetrahydrofolate (THF) compounds. In tetrahydrofolic acid R = H; other substituents are listed in Table 1. The asterisk indicates the site of attachment of extra glutamate residues; the hatched line and double asterisk indicates the N5 and/or N10 site of attachment of one-carbon units.

Table 1 Structure and nomenclature of folate compounds (see Figure 1)


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