Patent ID: 6890920

Claim:
A quaternary ammonium compound of the formula and any stereoisomers thereof, wherein R 1 , R 2 and R 3 independently represent C 1 -C 6 alkyl, optionally substituted with phenyl or hydroxyl, or both, and wherein any two of R 1 , R 2 and R 3 may form a ring together with the quaternary ammonium nitrogen; R 4 represents —H, —CH 3 , or —CO—R 4-1 ,wherein R 4-1 represents —(C 1 -C 4 alkyl), —(C 1 -C 4 alkoxy), or —NR 4-2 R 4-3 , wherein R 4-2 and R 4-3 independently represent —H or —(C 1 -C 4 alkyl); R 5 , R 6 and R 7 independently represent —H, —OCH 3 , —OH, —CONH 2 , —SO 2 NH 2 , —F, —Cl, —Br, —I, —CF 3 , or —(C 1 -C 4 alkyl), optionally substituted with one or two —OH, —(C 1 -C 4 alkoxy), —COOH, or —CO—O—(C 1 -C 3 alkyl); and X − represents an anion of a pharmaceutically acceptable acid.