Acid adduct salts of a substituted pyridine compound as inhibitors of protein transfer cholesteryl ester (CETP)

A salt formed from a compound represented by the general formula (I): Formula ** ** in which R1 represents a (2S) -2,3-dihydroxypropyloxy group, a (2R) -2,3-dihydroxypropyloxy group, a 3-hydroxy-3-methylbutoxy, 3- (methylsulfonyl) propoxy group, a 3-hydroxy-2- (hydroxymethyl) propoxy group, a 3-hydroxy-2- (hydroxymethyl) -2-methylpropoxy or 3-carboxyphenyl group, and an acid selected from the group consisting of hydrochloric acid, hydrobromic acid, methanesulfonic acid, benzenesulfonic acid, succinic acid, fumaric acid and maleic acid.