| 摘要 |
PROBLEM TO BE SOLVED: To provide compounds useful in prevention and medical treatment of hyperphosphatemia and diseases related to hyperphosphatemia and their pharmacologically acceptable salts. ! SOLUTION: Compounds of formula (I) and their pharmacologically acceptable salts are provided. In formula (I), R1 is -OH or -SH; R2 is a halogen group, a 1-6C alkyl group, a halogeno-(1-6C)-alkyl group, a 1-6C alkoxy group, a halogeno-(1-6C)-alkoxy group, a cyano group, a nitro group or a phenyl group optionally substituted with a group selected from specified substituent groups; R3 is a 1-6C alkyl group optionally substituted with a group selected from specified substituent groups. ! COPYRIGHT: (C)2015,JPO&INPIT |
