Patent ID: 8202995

Claim:
A pharmaceutically acceptable compound, which is a 1:1 salt of a basic compound of the following formula (I) and a carboxyl group-containing acidic agent wherein, each of R 1 , R 2 , R 3 and R 4 , independently, is hydrogen, or C 1-6 alkyl; R is hydrogen, C 1-6 alkyl, —C(O)R 5 or C 1-6 alkyl substituted by the following group: —C(O)OR 6 , —C(O)NR 6 R 7 , —OR 6 , —NR 6 R 7 , C 4-9 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, C 4-9 heterocyclyl containing at least one heteroatom selected from the group consisting of N, O and S, or C 6-10 aryl unsubstituted or substituted by at least one selected from the group consisting of halogen, hydroxyl, C 1-6 alkoxy and C 1-6 alkyl; R 5 is C 4-9 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, or C 1-6 alkyl substituted by —NR 6 R 7 or C 4-9 heterocyclyl containing at least one heteroatom selected from the group consisting of N, O and S; each of R 6 and R 7 , independently, is hydrogen, C 1-6 alkyl, C 4-9 heteroaryl containing at least one heteroatom selected from the group consisting of N, O and S, C 4-9 heterocyclyl containing at least one heteroatom selected from the group consisting of N, O and S, or C 6-10 aryl unsubstituted or substituted by at least one selected from the group consisting of halogen, hydroxyl, C 1-6 alkoxy and C 1-6 alkyl; and the carboxyl group-containing acidic agent is selected from the group consisting of atorvastatin, telmisartan, captopril, bezafibrate, repaglinide, acetylcytsteine, chromocarb, nateglinide, salsalate, and ozagrel.