folates

https://doi.org/10.1351/goldbook.F02472
A group of heterocyclic compounds based on the pteroic acid skeleton (below) conjugated with one or more l-glutamate units.
F02472.png
Source:
White Book,2nd ed., p. 266 (http://www.chem.qmul.ac.uk/iupac/bibliog/white.html)