Opioid receptor (mor) agonist salt, fumarate salt crystal form i thereof and preparation method thereof

Abstract

Relating to an opioid receptor agonist (1S,4S)-4-ethoxy-N-(2-((R)-9-(pyridin-2-yl)-6-oxaspiro[4.5]deca-9-yl)ethyl)-1,2,3,4-tetrahydronaphthalen-1-amine fumarate salt, a fumarate salt crystal form I thereof, and a preparation method and an application therefor.

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