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- [1] STRUCTURES OF ISOMERS OF URSODEOXYCHOLIC ACID - 3-BETA,7-ALPHA-DIHYDROXY-5-BETA-CHOLAN-24-OIC AND 3-BETA,7-BETA-DIHYDROXY-5-BETA-CHOLAN-24-OIC ACIDS YAKUGAKU ZASSHI-JOURNAL OF THE PHARMACEUTICAL SOCIETY OF JAPAN, 1992, 112 (08): : 563 - 570