{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/endomorphin-1/tennessee/","compound":{"slug":"endomorphin_1","name":"Endomorphin-1","same_as":"https://en.wikipedia.org/wiki/Endomorphin"},"jurisdiction":{"code":"TN","name":"Tennessee"},"as_of":"2026-07-18","answer":"As of July 18, 2026, Endomorphin-1 is legal to sell at retail in Tennessee. Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide. Controlling source: TN Code 39-17-454 (controlled substance analogue; conjunctive, structure = near-identity <=2 atoms/1 group/1 bond).","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":"TN Code 39-17-454: \"'controlled substance analogue' means a ... substance ... that has the stimulant, depressant or hallucinogenic effect on the central nervous system of a controlled substance; AND (A) Has a chemical structure which is a derivative or structural analogue of the chemical structure of a controlled substance; provided, that ... 'analogue' means the structure of the tested item differs in no more than two (2) atoms, one (1) functional group, or one (1) double bond, from the structure of a controlled substance.\" [Conjunctive + near-identity structure test - impossible for a tetrapeptide.]","excerpt_source_url":"https://law.justia.com/codes/tennessee/title-39/chapter-17/part-4/section-39-17-454/","citations":[{"title":"TN Code 39-17-454 (controlled substance analogue; conjunctive, structure = near-identity <=2 atoms/1 group/1 bond)","url":"https://law.justia.com/codes/tennessee/title-39/chapter-17/part-4/section-39-17-454/","pinpoint":null,"publisher":"Code mirror","type":"statute","primary":true,"official":true},{"title":"TN Code 39-17-454 (analogue def)","url":"https://law.justia.com/codes/tennessee/title-39/chapter-17/part-4/section-39-17-454/","pinpoint":null,"publisher":"Code mirror","type":"statute","primary":false,"official":true}],"history":[]}],"neighbors":[{"code":"AL","status":"legal"},{"code":"AR","status":"legal"},{"code":"GA","status":"legal"},{"code":"KY","status":"legal"},{"code":"MS","status":"legal"},{"code":"MO","status":"legal"},{"code":"NC","status":"legal"},{"code":"VA","status":"legal"}],"laws":[{"citation":"T.C.A. Sec. 39-17-454","title":"Controlled substance analogues","official_url":"https://law.justia.com/codes/tennessee/title-39/chapter-17/part-4/section-39-17-454/","source_label":"MIRROR","effective_date":null,"retrieved_date":"2026-07-20","text_hash":"34473f1aa806770dbe6d852f73c65beb66ec1a9a3d3a874e8dea9a22854b1cdd"},{"citation":"Tenn. Code Ann. § 39-17-406(d) (Schedule I hallucinogens — enumerated, 4-HO-MET absent); § 39-17-454(a)(1) (controlled substance analogue)","title":null,"official_url":"https://law.justia.com/codes/tennessee/2021/title-39/chapter-17/part-4/section-39-17-406/","source_label":"MIRROR","effective_date":null,"retrieved_date":"2026-06-19","text_hash":"8d0822600052fa33ebf0af0598ac4c6ce60ae35645c5081870d2ee8d3f207cf4"}]}