Patent ID: 7217823

Claim:
A compound represented by A: wherein R represents H, alkyl, aralkyl, cycloalkyl, alkenyl, 5-, 6-, or 7-membered single-ring aromatic group that includes zero heteroatoms, acyl, or sulfonyl; R 1 represents optionally substituted 5-, 6-, or 7-membered single-ring aromatic group that includes zero heteroatoms; R 2 represents RO-alkyl, (R) 2 N-alkyl, RS-alkyl, RO-cycloalkyl, (R) 2 N-cycloalkyl, or RS-cycloalkyl; R 3 represents H, alkyl, —OR, or F; R 4 represents H, alkyl, —OR, or F; R 5 represents an optionally substituted thiophene group; n is 0, 1, or 2; and the stereochemical configuration at any stereocenter of a compound represented by A is R, S, or a mixture of these configurations.