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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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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 +
 D03.438.733.631.192 Aminopterin D000630 +
 D03.438.733.631.192.500 Methotrexate D008727