US Patent Issued to BEIJING SHOWBY PHARMACEUTICAL on July 15 for "Crystals, preparation method and application of a muscarinic receptor antagonist" (Chinese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,358,908, issued on July 15, was assigned to BEIJING SHOWBY PHARMACEUTICAL Co. LTD. (China).

"Crystals, preparation method and application of a muscarinic receptor antagonist" was invented by Xiaoping Chen (Beijing) and Zejun Gao (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides crystals of a quaternary ammonium salt structure compound, i.e., (2R,3R)-3-[(2-cyclopentyl-2-hydroxy-2-phenyl)ethoxy]-1-(3-phenoxypropyl) azabicyclo[2,2,2]octylonium bromide (Compound I). A Type-A crystal of Compound I displays diffraction peaks at the following diffraction angles 2Theta in a X-ray powder diffraction pattern thereof: 5.7plus-m...