Cerebral-circulation-metabolism-function-improving agent.

摘要

Disclosed herein is a cerebral-circulation-metabolism-function-improving agent which contains a 2,6-diphenyl-3,7-dioxabicyclo[3.3.0]octane derivative represented by the following formula as the effective ingredient: <CHEM> wherein, each of R1, R3, R4 and R6 represents a hydrogen atom or a lower alkoxyl group; each of R2 and R5 represents a hydrogen atom, a beta -D-glucosyl group or a hydroxyl group; and each of R7 and R8 represents an oxygen atom or two hydrogen atoms. Fig. 1 indicates the cerebral-blood-stream-intensifying effect produced by administration of (+/-)-2,6-diphenyl-3,7-dioxabicyclo[3.3.0]octane-4,8-dione (a mixture of cis isomer and the trans isomer in a ratio of 2 to 1).