The present invention provides a compound (2S,3R) N-(2-((3-pyridinyl)methyl-1-azabicyclo[2.2.2]oct-3-yl)benzofuran-2-carboxamide or a pharmaceutically acceptable salt thereof, and which is substantially free of (2S,3S) N-(2-((3-pyridinyl)methyl-1-azabicyclo[2.2.2]oct-3-yl)benzofuran-2-carboxamide or a pharmaceutically acceptable salt thereof, (2R,3S) N-(2-((3-pyridinyl)methyl-1-azabicyclo[2.2.2]oct-3-yl)benzofuran-2-carboxamide or a pharmaceutically acceptable salt thereof, or (2R,3R) N-(2-((3-pyridinyl)methyl-1-azabicyclo[2.2.2]oct-3-yl)benzofuran-2-carboxamide or a pharmaceutically acceptable salt thereof.
本发明提供了一种化合物(2S,3R) N-(2-((3-
吡啶基)甲基-1-
氮杂双环[2.2.2]辛-3-基)
苯并呋喃-2-甲酰胺或其药学上可接受的盐,该化合物基本上不含 (2S,3S) N-(2-((3-
吡啶基)甲基-1-
氮杂双环[2.2.2]辛-3-基)
苯并呋喃-2-甲酰胺或其药学上可接受的盐、(2R,3S) N-(2-((3-
吡啶基)甲基-1-
氮杂双环[2.2.2]辛-3-基)
苯并呋喃-2-甲酰胺或其药学上可接受的盐,或 (2R,3R) N-(2-((3-
吡啶基)甲基-1-
氮杂双环[2.2.2]辛-3-基)
苯并呋喃-2-甲酰胺或其药学上可接受的盐。