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D03 Heterocyclic Compounds D006571 +
D03.383 Heterocyclic Compounds, 1-Ring D006573 +
D03.383.757 Pyrroles D011758 +
D03.383.757.840 Tetrapyrroles D045725 +
D03.383.757.840.249 Bile Pigments D001654 +
D03.383.757.840.374 Chlorophyll D002734 +
D03.383.757.840.500 Porphyrins D011166 +
D03.383.757.840.437 Corrinoids D045728 +
D03 Heterocyclic Compounds D006571 +
D03.549 Heterocyclic Compounds with 4 or More Rings D006576 +
D03.549.909 Tetrapyrroles D045725 +
D03.549.909.249 Bile Pigments D001654 +
D03.549.909.374 Chlorophyll D002734 +
D03.549.909.500 Porphyrins D011166 +
D03.549.909.437 Corrinoids D045728 +