The present invention provides a compound (I) for treating sequelae of ischemic cerebral stroke: H—(NH—CHR1—CO)—(NH—CHR2—CO)—(NH—CHR3—CO)—(NH—CHR4—CO)—(NH—CHR5—CO)—(NH—CHR6—CO)—(NH—CHR7—CO)—OH  (I) or a pharmaceutically acceptable salt thereof, wherein R1-R7 are defined herein. The present invention also provides a pharmaceutical composition comprising said compound and use of the same in the manufacture of a medicament for treating sequelae of ischemic cerebral stroke. The compound and pharmaceutical composition according to the present invention have good pharmacological activities so that they are able to improve significantly the symptom of sequelae of ischemic cerebral stroke.