131327-56-5Relevant articles and documents
FUSED RING SPIROKETAL DERIVATIVE AND USE THEREOF AS DRUG FOR TREATING DIABETES
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Page/Page column 46, (2009/05/29)
Provided are a compound represented by Formula (I): wherein R1, R2, R3, and R4 are each independently selected from a hydrogen atom, a C1-6 alkyl group which may be substituted, a C7-14 aralkyl group which may be substituted and -C(=O)Rx; n denotes an integer selected from 1 and 2; and ring Ar is selected from the groups represented by the following Formula (a) to (f). , or a prodrug thereof or a pharmaceutically acceptable salt thereof as well as a pharmaceutical agent and a pharmaceutical composition containing such a compound or a prodrug thereof, or a pharmaceutically acceptable salt thereof.