Diazabicyclo compounds of formula (I) in which R<1> is a substituted or unsubstituted lower alkyl, lower alkenyl or lower alkynyl; R<2> is a hydroxy; R<3> is a lower alkoxycarbonyl; R<4> and R<7> are hydrogens or substituted or unsubstituted phenyl groups; R<5> and R<6> are hydrogens or lower alkyl groups; or pharmaceutically acceptable salts thereof, having cardioprotective activity.
