| abstract |
A pharmaceutical composition for the prevention and treatment of cerebrovascular damage, wherein, as an active ingredient, wherein R1 is C1-C4 alkyl or C6-10 is optionally substituted aryl; R2 and R3 are independently hydrogen or C1-C4 alkyl, or R2 and R3 are attached to form a C3-7 ring, R4 is a lower alkyl group optionally substituted by aryl, cycloalkyl or aromatic heterocyclic group containing a pharmaceutically acceptable salt thereof. HE |