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D03 Heterocyclic Compounds D006571 +
D03.438 Heterocyclic Compounds, 2-Ring D006574 +
D03.438.733 Pteridines D011621 +
D03.438.733.631 Pterins D011622 +
D03.438.733.631.202 Biopterin D001708 +
D03.438.733.631.202.500 Neopterin D019798
D08 Enzymes and Coenzymes D045762 +
D08.211 Coenzymes D003067 +
D08.211.090 Biopterin D001708 +
D08.211.090.500 Neopterin D019798
D11 Growth Substances, Pigments, and Vitamins D006134 +
D11.303 Growth Substances D006133 +
D11.303.180 Biopterin D001708 +
D11.303.180.500 Neopterin D019798