{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/endomorphin-1/wisconsin/","compound":{"slug":"endomorphin_1","name":"Endomorphin-1","same_as":"https://en.wikipedia.org/wiki/Endomorphin"},"jurisdiction":{"code":"WI","name":"Wisconsin"},"as_of":"2026-07-18","answer":"As of July 18, 2026, Endomorphin-1 is legal to sell at retail in Wisconsin. Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide. Controlling source: Wis. Stat. 961.01(4m) (controlled substance analog; CONJUNCTIVE; effect prong includes 'narcotic').","forms":[{"form":"all","label":"All forms","status":"legal","state_status":null,"federal_overlay":false,"headline":"Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide","rule_type":"permanent","tier":"unscheduled","schedule_class":null,"limit":null,"effective_date":null,"verified_at":"2026-07-18","confidence":"confirmed","verbatim_excerpt":"Wis. Stat. 961.01(4m)(a): \"'Controlled substance analog' means a substance the chemical structure of which is substantially similar to the chemical structure of a controlled substance included in schedule I or II AND: 1. Which has a stimulant, depressant, narcotic or hallucinogenic effect on the central nervous system substantially similar to ...; or 2. ... which the individual represents or intends to have [such effect] ...\" (b) excludes controlled substances, approved-new-drug, and investigational substances. [Conjunctive - mandatory structure prong fails for a peptide despite the 'narcotic' effect term.]","excerpt_source_url":"https://docs.legis.wisconsin.gov/document/statutes/961.01","citations":[{"title":"Wis. Stat. 961.01(4m) (controlled substance analog; CONJUNCTIVE; effect prong includes 'narcotic')","url":"https://docs.legis.wisconsin.gov/statutes/statutes/961/i/01/4m","pinpoint":null,"publisher":"Code mirror","type":"statute","primary":true,"official":true},{"title":"Wis. Stat. 961.41 (offense)","url":"https://codes.findlaw.com/wi/controlled-substances-ch-961/wi-st-961-01/","pinpoint":null,"publisher":"Code mirror","type":"statute","primary":false,"official":true}],"history":[]}],"neighbors":[{"code":"IL","status":"legal"},{"code":"IA","status":"legal"},{"code":"MI","status":"legal"},{"code":"MN","status":"legal"}],"laws":[{"citation":"Wis. Stat. § 961.14(4) (Schedule I hallucinogens — enumerated, 4-HO-MET absent); § 961.01(4m) (controlled substance analog); § 961.01(12g) (isomer definition)","title":null,"official_url":"https://docs.legis.wisconsin.gov/document/statutes/961.14(4","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-06-19","text_hash":"3a1ed7bf79fb18f54f55ce1dff3d8a3498bf1bd758a940ca0fd177139ed9a2ec"},{"citation":"Wis. Stat. Sec. 961.25 (with Sec. 961.01(4m)(a))","title":"Controlled substance analog treated as a schedule I substance (deeming clause) and the controlled-substance-analog definition","official_url":"https://docs.legis.wisconsin.gov/statutes/statutes/961.pdf","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-20","text_hash":"0a7fd287ab38c9170f4e8181dc5bdbf164586a9dc6cbacf880c6478d912655a2"}]}