{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-13T06:59:48Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T10:00:00Z", "ingestedAt": "2026-10-06T07:07:57+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-08T19:09:53+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q3360898", "registryId": "vr.tr.purines", "name": "purines", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q3360898/", "model": { "registry_id": "vr.tr.purines", "name": "purines", "purpose": "Let an agent explain purines and their structure, relay biological roles, metabolism and pharmacology from biochemistry references, describe purine alkaloids and natural products, and distinguish purines from pyrimidines, from purine nucleotides and from dietary purine concerns handled by clinicians.", "definition": "A class of heterocyclic aromatic compounds built on the purine ring system, a fused pyrimidine and imidazole, including the nucleobases adenine and guanine that form DNA and RNA, metabolic intermediates such as hypoxanthine and xanthine, uric acid, purine alkaloids such as caffeine and theobromine, unusual natural products such as discadenine and marine purine terpenoids named systematically in the registry aliases, and synthetic purine drugs; purines are central to genetics, energy metabolism and signalling.", "what_it_is_for": "Not applicable; a class of compounds.", "affordances": [ "explain structure and members", "relay biology and metabolism", "describe alkaloids and drugs", "distinguish related compounds" ], "distinguishing_features": [ "Fused two-ring system", "Nucleobase members", "Metabolic and signalling roles", "Alkaloids and drugs" ], "appearance": "Not a visible object; heterocyclic molecules.", "visual_identification": [ "Compounds with the purine ring", "Adenine, guanine, hypoxanthine, xanthine, uric acid, caffeine, theobromine, discadenine, marine purine terpenoids", "Pyrimidines are single-ring bases; nucleotides add sugar and phosphate; dietary purines are a nutrition topic" ], "physical_properties": [ { "quantity": "core", "typical_range": "imidazo[4,5-d]pyrimidine", "unit": "structure", "note": "" }, { "quantity": "DNA purines", "typical_range": "adenine, guanine", "unit": "list", "note": "" }, { "quantity": "caffeine", "typical_range": "1,3,7-trimethylxanthine", "unit": "note", "note": "purine alkaloid" } ], "families_and_kinds": [ "nucleobases adenine and guanine", "metabolic purines hypoxanthine, xanthine and uric acid", "purine alkaloids such as caffeine, theobromine and theophylline", "unusual natural products such as discadenine and marine purine terpenoids", "purine nucleotides such as ATP and GTP", "synthetic purine drugs such as allopurinol and acyclovir" ], "related_models": [ { "relation": "is a kind of", "target": "imidazopyrimidine", "why": "in registry terms" }, { "relation": "includes", "target": "adenine", "why": "and guanine as nucleobases" }, { "relation": "is contrasted with", "target": "pyrimidine", "why": "the single-ring base class" }, { "relation": "is degraded to", "target": "uric acid", "why": "in humans" } ], "identifiers": [ { "scheme": "ChEBI", "value_or_pattern": "CHEBI:26401", "note": "purines" }, { "scheme": "CAS", "value_or_pattern": "120-73-0", "note": "purine parent compound" } ], "standards_and_regulation": [ "IUPAC nomenclature for purines", "Drug regulation for purine-based medicines", "Food regulations for caffeine" ], "failure_modes_and_hazards": [ "Confusing purines with pyrimidines or nucleotides", "Agents giving personal dietary advice on gout", "Registry aliases naming obscure compounds by systematic names" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Explain the purine ring system and name common purines such as adenine, guanine and caffeine.", "Distinguish purines from pyrimidines, nucleosides and nucleotides when asked.", "Point people with gout or kidney stones to a clinician for dietary guidance." ], "must_not": [ "Give a person an individual purine-restricted diet or medication plan as if it were medical advice.", "Present caffeine or other purine alkaloids as safe at any dose for everyone.", "Confuse an obscure systematic compound name with a well-known purine.", "Claim health effects for purine-rich foods that the evidence does not support." ], "requires_human": [ "Changing the diet or uric acid treatment of a person with gout or kidney disease." ] }, "ethics": { "considerations": [ "People managing gout rely on accurate information about purines in food.", "Stimulant purines such as caffeine are widely consumed, so overstated claims reach many people." ], "affected_parties": [ "People with gout", "Patients with kidney stones", "Students and researchers" ] }, "owners": { "steward": "Nobody owns the class; chemical nomenclature bodies maintain its naming.", "master_systems": [ "Chemical substance databases" ] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q3360898: purines", "url": "https://www.wikidata.org/wiki/Q3360898", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-de", "title": "Wikipedia (de): Purine", "url": "https://de.wikipedia.org/wiki/Purine", "url_status": "live", "checked_by": "wikidata-api sitelink", "what_it_supports": "general description of the item" } ], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "What purines are.", "rationale": "Science.", "layers": [ { "id": "definition", "name": "Definition", "description": "Definition and structure.", "findings": [ { "id": "definition-finding", "name": "Definition", "description": "Definition.", "questions": [ { "text": "What are purines, and how do they differ from pyrimidines and nucleotides?", "kind": "definition" }, { "text": "Is the question about the class, a specific compound, metabolism or diet?", "kind": "boundary" } ] } ] }, { "id": "members", "name": "Members", "description": "Members.", "findings": [ { "id": "members-finding", "name": "Members", "description": "Members.", "questions": [ { "text": "What are adenine, guanine, hypoxanthine, xanthine, uric acid, caffeine, discadenine and the marine purine terpenoids named in the registry?", "kind": "definition" }, { "text": "Which entry fits the specific compound?", "kind": "action" } ] } ] } ] }, { "id": "biology", "name": "Biology", "description": "Biology.", "rationale": "Science.", "layers": [ { "id": "roles", "name": "Roles", "description": "Roles.", "findings": [ { "id": "roles-finding", "name": "Roles", "description": "Roles.", "questions": [ { "text": "How do purines function in DNA, RNA, ATP, GTP, cAMP and signalling?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "metabolism", "name": "Metabolism", "description": "Metabolism.", "findings": [ { "id": "metabolism-finding", "name": "Metabolism", "description": "Metabolism.", "questions": [ { "text": "How are purines synthesised, salvaged and degraded to uric acid?", "kind": "provenance" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] } ] }, { "id": "medicine", "name": "Medicine", "description": "Medicine and alkaloids.", "rationale": "Clinical.", "layers": [ { "id": "disease", "name": "Disease", "description": "Disease.", "findings": [ { "id": "disease-finding", "name": "Disease", "description": "Disease.", "questions": [ { "text": "How do purine metabolism disorders such as gout and Lesch-Nyhan syndrome arise, in general terms?", "kind": "provenance" }, { "text": "Is the user asking about their own diet or condition, which needs a clinician?", "kind": "boundary" } ] } ] }, { "id": "drugs", "name": "Drugs", "description": "Drugs and alkaloids.", "findings": [ { "id": "drugs-finding", "name": "Drugs", "description": "Drugs.", "questions": [ { "text": "How do purine alkaloids such as caffeine and purine drugs such as allopurinol and acyclovir act?", "kind": "provenance" }, { "text": "Which entry fits the specific drug?", "kind": "action" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "Natural products and history.", "rationale": "Context.", "layers": [ { "id": "natural", "name": "Natural", "description": "Natural products.", "findings": [ { "id": "natural-finding", "name": "Natural", "description": "Natural.", "questions": [ { "text": "What unusual purines such as discadenine and marine purine terpenoids exist, and why are they studied?", "kind": "provenance" }, { "text": "Which entry fits natural product chemistry?", "kind": "action" } ] } ] }, { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How did Fischer and others discover and synthesise purines?", "kind": "provenance" }, { "text": "Which entry fits the history of biochemistry?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should adenine, guanine and caffeine be the primary linked entries?", "How should biochemistry references be linked?", "The registry entry has merged aliases naming specific natural products; should they be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }